Definition of fatiguing
: causing physical or mental weariness or exhaustion : causing fatigue
For tens of thousands of Americans afflicted with inflammatory muscle diseases, simple tasks may be overwhelmingly difficult or fatiguing.— Jane E. Brody … sleazy discos that have provided the subject matter (and often the fatiguing life style) for many of his contemporaries.— Carolyn Gaiser
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Merriam-Webster unabridged
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Time Traveler for fatiguing
The first known use of fatiguing was in 1696
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