What is another word for used up?

Here are some words that can be used as synonyms for "used up," depending on the context:

General:

* Exhausted

* Depleted

* Spent

* Consumed

* Finished

* Done

* Emptied

* Worn out

* Discarded

More specific:

* For resources: Exhausted, depleted, drained, consumed, dissipated

* For energy: Tired, weary, drained, fatigued

* For objects: Worn out, broken, damaged, discarded

* For time: Gone, over, finished, elapsed

Informal:

* Gone

* Kaput

* Busted

* Done for

* Shot

The best word to use will depend on the specific situation and the tone you want to convey.