Antonyms of adj untired

1 sense of untired

Sense 1
untired, unwearied, unweary -- (with unreduced energy)

INDIRECT (VIA rested) -> tired -- (depleted of strength or energy; "tired mothers with crying babies"; "too tired to eat")

Similarity of adj untired

1 sense of untired

Sense 1
untired, unwearied, unweary -- (with unreduced energy)
       => rested (vs. tired) -- (not tired; refreshed as by sleeping or relaxing; "came back rested from her vacation")