kuta-kuta
Describes being utterly exhausted or something that has gone limp from overuse or overcooking. Has a softer feel than heto-heto.
💡After overtime work — 'I'm kuta-kuta from working late every night.'
残業続きでくたくたに疲れた。
I'm kuta-kuta tired from all the overtime.
She was ___ after taking care of the kids all day.
一日中子供の世話をして○○になった。