Wordnet 3.0
ADJECTIVE (1)
1. 
 with unreduced energy; 
[syn: untired, unwearied, unweary]
The Collaborative International Dictionary of English v.0.48:
Untired \Untired\
   See tired.
WordNet (r) 3.0 (2006):
untired
    adj 1: with unreduced energy [syn: untired, unwearied,
           unweary]