So weak or defective as to be liable to fail

• undependable

  1. Not easily relied or depended on:

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  1. Not easily relied or depended on:

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• trick

  1. An act or procedure intended to achieve an end by deceptive or fraudulent means.
  2. A mischievous action; a prank:
  3. A stupid, disgraceful, or childish act:

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  1. An act or procedure intended to achieve an end by deceptive or fraudulent means.
  2. A mischievous action; a prank:
  3. A stupid, disgraceful, or childish act:

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Not to be depended on

• untrustworthy

  1. Not deserving of trust; unreliable.

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  1. Not deserving of trust; unreliable.

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• undependable

  1. Not easily relied or depended on:

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  1. Not easily relied or depended on:

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Not reliable; said of persons

• unpredictable

  1. Difficult to foretell or foresee:
  2. Something difficult or impossible to foretell or foresee.

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  1. Difficult to foretell or foresee:
  2. Something difficult or impossible to foretell or foresee.

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• weak

  1. Lacking physical strength, energy, or vigor; feeble.
  2. Likely to fail under pressure, stress, or strain; lacking resistance:
  3. Lacking firmness of character or strength of will:

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  1. Lacking physical strength, energy, or vigor; feeble.
  2. Likely to fail under pressure, stress, or strain; lacking resistance:
  3. Lacking firmness of character or strength of will:

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• fallible

  1. Capable of making an error:
  2. Tending or likely to be erroneous:

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  1. Capable of making an error:
  2. Tending or likely to be erroneous:

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• vacillating

  1. wavering or tending to waver in motion, opinion, etc.

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  1. wavering or tending to waver in motion, opinion, etc.

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• untrustworthy

  1. Not deserving of trust; unreliable.

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  1. Not deserving of trust; unreliable.

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• capricious

  1. Characterized by, arising from, or subject to caprice; impulsive or unpredictable:

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  1. Characterized by, arising from, or subject to caprice; impulsive or unpredictable:

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• giddy

  1. Having a reeling, lightheaded sensation; dizzy.
  2. Causing or capable of causing dizziness:
  3. Frivolous and lighthearted; flighty:

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  1. Having a reeling, lightheaded sensation; dizzy.
  2. Causing or capable of causing dizziness:
  3. Frivolous and lighthearted; flighty:

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• fickle

  1. Characterized by erratic changeableness or instability, especially with regard to affections or attachments; capricious.

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  1. Characterized by erratic changeableness or instability, especially with regard to affections or attachments; capricious.

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• untrue

  1. Contrary to fact; false.
  2. Deviating from a standard; not straight, even, level, or exact.
  3. Disloyal; unfaithful.

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  1. Contrary to fact; false.
  2. Deviating from a standard; not straight, even, level, or exact.
  3. Disloyal; unfaithful.

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• underhanded

  1. Acting or done in a deceptive, secret, or sly manner; dishonest and sneaky.
  2. Underhand:
  3. In a sly and secret way.

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  1. Acting or done in a deceptive, secret, or sly manner; dishonest and sneaky.
  2. Underhand:
  3. In a sly and secret way.

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• furtive

  1. Characterized by, acting with, or suggesting stealth or a desire to avoid discovery; surreptitious:

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  1. Characterized by, acting with, or suggesting stealth or a desire to avoid discovery; surreptitious:

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• shifty

  1. Having, displaying, or suggestive of deceitful character; evasive or untrustworthy.
  2. Distinguished by frequent changes in direction:
  3. Able to accomplish what is needed; resourceful.

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  1. Having, displaying, or suggestive of deceitful character; evasive or untrustworthy.
  2. Distinguished by frequent changes in direction:
  3. Able to accomplish what is needed; resourceful.

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• tricky

  1. Given to or characterized by trickery.
  2. Requiring caution or skill:

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  1. Given to or characterized by trickery.
  2. Requiring caution or skill:

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• deceitful

  1. Given to cheating or deceiving.
  2. Deliberately misleading; deceptive.

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  1. Given to cheating or deceiving.
  2. Deliberately misleading; deceptive.

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• wavering

  1. Fluctuating; being in doubt; undetermined; indecisive; uncertain; unsteady.
  2. Present participle of waver.
  3. A state of fluctuation or indecision.

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  1. Fluctuating; being in doubt; undetermined; indecisive; uncertain; unsteady.
  2. Present participle of waver.
  3. A state of fluctuation or indecision.

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• unstable

  1. Tending strongly to change:
  2. Not constant; fluctuating:
  3. Wavering or fickle:

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  1. Tending strongly to change:
  2. Not constant; fluctuating:
  3. Wavering or fickle:

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• irresponsible

  1. Marked by a lack of responsibility:
  2. Lacking a sense of responsibility; unreliable or untrustworthy.
  3. Not liable to be called to account by a higher authority.

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  1. Marked by a lack of responsibility:
  2. Lacking a sense of responsibility; unreliable or untrustworthy.
  3. Not liable to be called to account by a higher authority.

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• undependable

  1. Not easily relied or depended on:

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  1. Not easily relied or depended on:

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Not reliable; said of facts and objects

• misleading

  1. Tending to mislead; deceptive.

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  1. Tending to mislead; deceptive.

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• meretricious

  1. Attracting attention in a vulgar manner:
  2. Plausible but false or insincere; specious:
  3. Of or relating to prostitutes or prostitution:

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  1. Attracting attention in a vulgar manner:
  2. Plausible but false or insincere; specious:
  3. Of or relating to prostitutes or prostitution:

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• makeshift

  1. Suitable as a temporary or expedient substitute:
  2. A temporary or expedient substitute for something else:

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  1. Suitable as a temporary or expedient substitute:
  2. A temporary or expedient substitute for something else:

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• pseudo

  1. False or counterfeit; fake.

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  1. False or counterfeit; fake.

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• sham

  1. Something false or empty that is purported to be genuine:
  2. Deceitfulness or pretense:
  3. One who claims to be what he or she is not; an impostor or fraud:

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  1. Something false or empty that is purported to be genuine:
  2. Deceitfulness or pretense:
  3. One who claims to be what he or she is not; an impostor or fraud:

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• pretended

  1. Not genuine or sincere; feigned:
  2. Supposed; alleged:

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  1. Not genuine or sincere; feigned:
  2. Supposed; alleged:

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• hollow

  1. Having a cavity, gap, or space within:
  2. Deeply indented or concave; sunken:
  3. Without substance or character:

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  1. Having a cavity, gap, or space within:
  2. Deeply indented or concave; sunken:
  3. Without substance or character:

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• erroneous

  1. Containing or derived from error; mistaken:

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  1. Containing or derived from error; mistaken:

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• inaccurate

  1. Mistaken or incorrect; not accurate.

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  1. Mistaken or incorrect; not accurate.

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• untrue

  1. Contrary to fact; false.
  2. Deviating from a standard; not straight, even, level, or exact.
  3. Disloyal; unfaithful.

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  1. Contrary to fact; false.
  2. Deviating from a standard; not straight, even, level, or exact.
  3. Disloyal; unfaithful.

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• unsound

  1. Not dependably strong or solid.
  2. Not physically or mentally healthy.
  3. Not true or logically valid; fallacious:

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  1. Not dependably strong or solid.
  2. Not physically or mentally healthy.
  3. Not true or logically valid; fallacious:

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• tricky

  1. Given to or characterized by trickery.
  2. Requiring caution or skill:

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  1. Given to or characterized by trickery.
  2. Requiring caution or skill:

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• specious

  1. Having the ring of truth or plausibility but actually fallacious:
  2. Deceptively appealing:

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  1. Having the ring of truth or plausibility but actually fallacious:
  2. Deceptively appealing:

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• plausible

  1. Seemingly or apparently valid, likely, or acceptable; credible:
  2. Persuasive or ingratiating, especially in an effort to deceive.

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  1. Seemingly or apparently valid, likely, or acceptable; credible:
  2. Persuasive or ingratiating, especially in an effort to deceive.

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• hallucinatory

  1. Of or characterized by hallucination.
  2. Inducing hallucination.

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  1. Of or characterized by hallucination.
  2. Inducing hallucination.

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• delusive

  1. Tending to delude.
  2. Having the nature of a delusion; false:

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  1. Tending to delude.
  2. Having the nature of a delusion; false:

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• deceptive

  1. Deceiving or tending to deceive:

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  1. Deceiving or tending to deceive:

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