Synonyms of fatiguing

1 Syllable

trying

2 Syllables

wearing, grueling, snoozer, wearying, taxing, tedious, sapping, arduous, dragger, draining

3 Syllables

laborious, exhausting, onerous, depleting

4 Syllables

wearisome, boresome, unenjoyable, tiresome, overtaxing

5 Syllables

enervative, uninteresting, unentertaining, debilitating