Wordnet 3.0
ADJECTIVE (1)
1. 
 not used up completely; 
- Example: "an unexhausted well"
The Collaborative International Dictionary of English v.0.48:
Unexhausted \Unexhausted\
   See exhausted.
WordNet (r) 3.0 (2006):
unexhausted
    adj 1: not used up completely; "an unexhausted well" [ant:
           exhausted, spent]