IPA: /aʊtˈspɛnt/
KK: /aʊtspɛnt/
Completely exhausted or worn out, often due to excessive spending or effort.
After the long hike, I felt outspent and needed to rest.
Outspent → It is formed from "out-" (meaning beyond or more than) and "spend" (from Old French *despendre*, meaning to expend or use up). The word "outspent" means to have spent more than what was available or to have exhausted resources beyond a limit.
Think of spending 'beyond' ('out-') what you have — that's why 'outspent' means to have used up more resources than available.