fatiguing

UK: /fəˈtiːgɪŋ/

From the verb fatigue: (⇒ conjugate)

fatiguing is: ⓘ

v pres p

WordReference Random House Learner's Dictionary of American English © 2026

fa•tigue /fəˈtig/   n., v., -tigued, -ti•guing. 
n. 

1. Physiology weariness from exertion:
   [uncountable] I had a feeling of great fatigue after that long trip.
2. Civil Engineering the weakening of material that has undergone stress, esp. repeated stress:
   [uncountable] Metal fatigue is causing that bridge to crack.
3. Military fatigues. Also called faˈtigue ˌclothes. [plural] military clothing worn for routine jobs or in battle.

v. [~ + object]

4. to cause to be weary;
   exhaust;
   enervate:
   Climbing the mountain fatigued the whole group.

WordReference Random House Unabridged Dictionary of American English © 2026

fa•tigue  (fə tēg′), n., adj., v., -tigued, -ti•guing. 
n. 

1. Physiology weariness from bodily or mental exertion.
2. a cause of weariness;
   slow ordeal;
   exertion:
   the fatigue of driving for many hours.
3. Physiology temporary diminution of the irritability or functioning of organs, tissues, or cells after excessive exertion or stimulation.
4. Civil Engineering the weakening or breakdown of material subjected to stress, esp. a repeated series of stresses.
5. Military Also called fatigue′ du′ty. 
   • Military labor of a generally nonmilitary kind done by soldiers, such as cleaning up an area, digging drainage ditches, or raking leaves.
   • the state of being engaged in such labor:
     on fatigue.
6. Military fatigues, See fatigue clothes. 

adj. 

7. of or pertaining to fatigues or any clothing made to resemble them:
   The guerrilla band wore fatigue pants and field jackets. She brought fatigue shorts to wear on the hike.

v.t. 

8. to weary with bodily or mental exertion;
   exhaust the strength of:
   Endless chatter fatigues me.
9. Civil Engineering to subject (a material) to fatigue.

v.i. 

10. to become fatigued.
11. Civil Engineering (of a material) to undergo fatigue.

• Latin fatīgāre to tire
• French fatigue (noun, nominal), fatiguer (verb, verbal)
• 1685–95

fa•tigue′less, adj. 
fa•ti′guing•ly, adv. 
Synonyms

• 8. tire, debilitate, enervate.

Collins Concise English Dictionary © HarperCollins Publishers::

fatigue / fəˈtiːɡ/ noun

1. physical or mental exhaustion due to exertion
2. a tiring activity or effort
3. the temporary inability of an organ or part to respond to a stimulus because of overactivity
4. the progressive cracking of a material subjected to alternating stresses, esp vibrations
5. the temporary inability to respond to a situation or perform a function, because of overexposure or overactivity: compassion fatigue
6. any of the mainly domestic duties performed by military personnel, esp as a punishment
7. (plural) special clothing worn by military personnel to carry out such duties

verb ( -tigues, -tiguing, -tigued)

1. to make or become weary or exhausted

Etymology: 17th Century: from French, from fatiguer to tire, from Latin fatīgāre

fatigable / ˈfætɪɡəb^əl/ adjective