Requiring great or extreme bodily, mental, or spiritual strength

• arduous

  1. Using much energy; strenuous
  2. Hard to traverse, climb, or surmount.
  3. Difficult to do; laborious; onerous

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  1. Using much energy; strenuous
  2. Hard to traverse, climb, or surmount.
  3. Difficult to do; laborious; onerous

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• backbreaking

  1. Requiring great physical exertion
  2. (Figuratively) Of work, very physically tiring.

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  1. Requiring great physical exertion
  2. (Figuratively) Of work, very physically tiring.

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• burdensome

  1. Of or like a burden; arduous or demanding
  2. Weighing much or hard to carry; heavy.
  3. Hard to bear; heavy; oppressive

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  1. Of or like a burden; arduous or demanding
  2. Weighing much or hard to carry; heavy.
  3. Hard to bear; heavy; oppressive

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• difficult

  1. Not easy to endure; full of hardship or trouble; trying:
  2. Hard to satisfy, persuade, please, etc.
  3. Not easy to comprehend, solve, or explain:

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  1. Not easy to endure; full of hardship or trouble; trying:
  2. Hard to satisfy, persuade, please, etc.
  3. Not easy to comprehend, solve, or explain:

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• effortful

  1. Requiring or showing effort.

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  1. Requiring or showing effort.

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• exacting

  1. Requiring precise accuracy
  2. Demanding great care, patience, effort, etc.; arduous
  3. Making excessive demands; hard to satisfy.

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  1. Requiring precise accuracy
  2. Demanding great care, patience, effort, etc.; arduous
  3. Making excessive demands; hard to satisfy.

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• exigent

  1. Calling for immediate action or attention; urgent; critical
  2. Having or making urgent demands; demanding:
  3. Requiring immediate action; pressing:

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  1. Calling for immediate action or attention; urgent; critical
  2. Having or making urgent demands; demanding:
  3. Requiring immediate action; pressing:

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• formidable

  1. Inspiring awe, admiration, or wonder:
  2. Difficult to undertake, surmount, or defeat:
  3. Hard to handle or overcome

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  1. Inspiring awe, admiration, or wonder:
  2. Difficult to undertake, surmount, or defeat:
  3. Hard to handle or overcome

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• hard

  1. Harsh or severe in effect or intention:
  2. Difficult to endure; causing hardship or suffering:
  3. Marked by stubborn refusal to compromise or yield; uncompromising:

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  1. Harsh or severe in effect or intention:
  2. Difficult to endure; causing hardship or suffering:
  3. Marked by stubborn refusal to compromise or yield; uncompromising:

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• heavy

  1. Hard to do or manage; difficult
  2. Hard to do or accomplish; arduous:
  3. Hard to digest

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  1. Hard to do or manage; difficult
  2. Hard to do or accomplish; arduous:
  3. Hard to digest

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• laborious

  1. Marked by or requiring long, hard work:
  2. Involving or calling for much hard work; difficult
  3. Mentally difficult; painstaking

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  1. Marked by or requiring long, hard work:
  2. Involving or calling for much hard work; difficult
  3. Mentally difficult; painstaking

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• onerous

  1. Burdensome; laborious
  2. Troublesome or oppressive; burdensome.
  3. (Law) Involving a legal obligation that equals or exceeds the benefits

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  1. Burdensome; laborious
  2. Troublesome or oppressive; burdensome.
  3. (Law) Involving a legal obligation that equals or exceeds the benefits

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• oppressive

  1. Hard to put up with; causing great discomfort or fatigue
  2. Burdensome or difficult to bear.
  3. Difficult to cope with; causing hardship or depressed spirits:

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  1. Hard to put up with; causing great discomfort or fatigue
  2. Burdensome or difficult to bear.
  3. Difficult to cope with; causing hardship or depressed spirits:

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• rigorous

  1. Characterized by or adhering to strict standards or methods; exacting and thorough:
  2. Rigidly precise; thoroughly accurate or exact
  3. Harsh, severe, or demanding:

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  1. Characterized by or adhering to strict standards or methods; exacting and thorough:
  2. Rigidly precise; thoroughly accurate or exact
  3. Harsh, severe, or demanding:

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• rough

  1. Regarded as being risky, dangerous, offensive, etc., often as a result of lacking in conventional social controls
  2. Difficult to endure or live through, especially because of harsh or inclement weather:
  3. Difficult to travel over or through:

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  1. Regarded as being risky, dangerous, offensive, etc., often as a result of lacking in conventional social controls
  2. Difficult to endure or live through, especially because of harsh or inclement weather:
  3. Difficult to travel over or through:

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• severe

  1. Causing great discomfort, damage, or distress:
  2. Unsparing, harsh, or strict, as in treatment of others:
  3. Extremely difficult to perform or endure; trying:

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  1. Causing great discomfort, damage, or distress:
  2. Unsparing, harsh, or strict, as in treatment of others:
  3. Extremely difficult to perform or endure; trying:

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• taxing

  1. Burdensome; wearing:
  2. With respect to an experience: exhausting; draining.

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  1. Burdensome; wearing:
  2. With respect to an experience: exhausting; draining.

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• tough

  1. Difficult to endure; severe; harsh:
  2. Hard to cut or chew:
  3. Very difficult; toilsome

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  1. Difficult to endure; severe; harsh:
  2. Hard to cut or chew:
  3. Very difficult; toilsome

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• trying

  1. Irritating, stressful or bothersome.
  2. That tries one's patience; annoying; exasperating; irksome
  3. Difficult to endure; arduous.

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  1. Irritating, stressful or bothersome.
  2. That tries one's patience; annoying; exasperating; irksome
  3. Difficult to endure; arduous.

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• weighty

  1. Of great consequence; serious or momentous:
  2. Having much weight; very heavy; ponderous
  3. Adapted to turn the balance in the mind, or to convince; important; forcible; serious; momentous.

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  1. Of great consequence; serious or momentous:
  2. Having much weight; very heavy; ponderous
  3. Adapted to turn the balance in the mind, or to convince; important; forcible; serious; momentous.

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Rigorous and unsparing in treating others

• exacting

  1. Requiring precise accuracy
  2. Demanding great care, patience, effort, etc.; arduous
  3. Making excessive demands; hard to satisfy.

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  1. Requiring precise accuracy
  2. Demanding great care, patience, effort, etc.; arduous
  3. Making excessive demands; hard to satisfy.

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• hard

  1. Difficult to endure; causing hardship or suffering:
  2. Lacking in shade; undiminished:
  3. Stern, strict, or demanding:

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  1. Difficult to endure; causing hardship or suffering:
  2. Lacking in shade; undiminished:
  3. Stern, strict, or demanding:

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• harsh

  1. Disagreeable to one of the senses, as:
  2. Unpleasantly coarse and rough to the touch:
  3. Severe, cruel, or exacting:

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  1. Disagreeable to one of the senses, as:
  2. Unpleasantly coarse and rough to the touch:
  3. Severe, cruel, or exacting:

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• rigid

  1. Scrupulously or severely maintained or performed; rigorous or harsh:
  2. Severe; strict; exacting
  3. Not bending or flexible; stiff and hard

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  1. Scrupulously or severely maintained or performed; rigorous or harsh:
  2. Severe; strict; exacting
  3. Not bending or flexible; stiff and hard

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• severe

  1. Causing great discomfort, damage, or distress:
  2. Unsparing, harsh, or strict, as in treatment of others:
  3. Extremely difficult to perform or endure; trying:

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  1. Causing great discomfort, damage, or distress:
  2. Unsparing, harsh, or strict, as in treatment of others:
  3. Extremely difficult to perform or endure; trying:

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• stern

  1. Difficult to endure; oppressive:
  2. Hard; severe; unyielding; strict
  3. Hard, harsh, or severe in manner or character:

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  1. Difficult to endure; oppressive:
  2. Hard; severe; unyielding; strict
  3. Hard, harsh, or severe in manner or character:

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• strict

  1. Conforming completely to established rule, principle, or condition:
  2. Not loose or vague; exact or precise:
  3. Perfect; absolute; entire

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  1. Conforming completely to established rule, principle, or condition:
  2. Not loose or vague; exact or precise:
  3. Perfect; absolute; entire

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• tough

  1. Very difficult; toilsome
  2. Hard to convince or influence; stubborn
  3. Hard to cut or chew:

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  1. Very difficult; toilsome
  2. Hard to convince or influence; stubborn
  3. Hard to cut or chew:

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• unyielding

  1. Incapable of being changed; unalterable:
  2. Not giving in; not bending; stubborn.
  3. Not giving way to pressure; hard or inflexible:

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  1. Incapable of being changed; unalterable:
  2. Not giving in; not bending; stubborn.
  3. Not giving way to pressure; hard or inflexible:

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Difficult

• hard

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• taxing

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• troublesome

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Querulous

• fussy

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• imperious

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• exacting

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