fatigation

be fatigued; yawn (get sleepy); droop, sink, flag; lose breath, lose wind; gasp, pant, puff, blow, drop, swoon, faint, succumb., fatigue, tire, weary, irk, flag, jade, harass, exhaust, knock up, wear out, prostrate., tax, task, strain; overtask, overwork, overburden, overtax, overstrain.