Search Result for "fatiguing": 

The Collaborative International Dictionary of English v.0.48:

Fatigue \Fa*tigue"\, v. t. [imp. & p. p. Fatigued; p. pr. & vb. n. Fatiguing, n.] [Cf. F. fatiguer. See Fatigue, n.] To weary with labor or any bodily or mental exertion; to harass with toil; to exhaust the strength or endurance of; to tire. Syn: To jade; tire; weary; bore. See Jade. [1913 Webster]
Moby Thesaurus II by Grady Ward, 1.0:

27 Moby Thesaurus words for "fatiguing": boresome, boring, devitalizing, draining, enervating, enfeebling, exhausting, fatiguesome, grueling, irksome, killing, punishing, sapping, straining, stressful, stupefyingly boring, stuporific, tiresome, tiring, toilsome, trying, weakening, weariful, wearing, wearisome, wearying, yawny