Part of speech:
Said or done as by an irresponsible person
Intended to deceive; deceptive; false
Having a reeling, lightheaded sensation; dizzy.
Distinguished by frequent changes in direction:
Acting or done in a deceptive, secret, or sly manner; dishonest and sneaky.
Not faithful or loyal
Changeable or unstable in affection, interest, loyalty, etc.; capricious
Subject to caprices; tending to change abruptly and without apparent reason; erratic; flighty
Capable of making an error:
Lacking intensity or strength; faint:
Deceiving or intended to deceive
Tending to delude.
Persuasive or ingratiating, especially in an effort to deceive.
In horse management an unsound horse is one suffering ill-health that affects its suitability for its intended work.
Not accurate; not correct; not exact; in error
Containing or derived from error; mistaken:
Having a reverberating, sepulchral sound:
Reputed or alleged
Not genuine; fake:
Alluring by false, showy charms; attractive in a flashy way; tawdry
Not fixed by rules, but left to one's judgment or choice; discretionary
Subject to sudden or frequent changes.
Full of danger; likely to cause injury, pain, etc.; unsafe; perilous
Not reputable; having or causing a bad reputation; discreditable
Given to or marked by deliberate deceptiveness in behavior or speech.
Having no fixed course or purpose; irregular; random; wandering
Characterized by irregular or intermittent activity, impulses, etc.; spasmodic; restless
Easily excited, upset, etc.
Of an impermanent or insubstantial nature:
Dependent upon or characterized by mere chance.
Having or marked by violent force:
(Mech.) Acting briefly and as a result of impulse
Quick and changeable in temperament; volatile:
That can or should be questioned or doubted; open to doubt
Of or like mercury
Of or relating to an event in which all outcomes are equally likely, as in the testing of a blood sample for the presence of a substance.
Precarious or insecure:
Subject to change; variable:
Beyond prudence or reason; excessive:
Lacking principles or moral scruples; unscrupulous:
Not safe; dangerous.
Not capable of being occupied or lived in:
Appropriate to or characteristic of a villain:
Playful or fanciful, especially in a humorous way:
Weak, defective, or liable to fail:
Done or acting in a stealthy manner, as if to hinder observation; surreptitious; stealthy; sneaky
Find another word for unreliable. In this page you can discover 75 synonyms, antonyms, idiomatic expressions, and related words for unreliable, like: undependable, irresponsible, deceitful, untrustworthy, false, feckless, giddy, unstable, wavering, tricky and shifty.