くたくたに疲れました。

exhausted; tired; withered; worn out; boiling until shapeless or mushy; tediously; repetitively; wordily

at (place, time); in; on; during; to (direction, state); toward; into; for (purpose); because of (reason); for; with; by; from; as (i.e. in the role of); per; in; for; a (e.g. "once a month"); and; in addition to; if; although

to get tired; to tire; to be worn out (e.g. of well used objects); to starve