Not weary (of); free from weariness; unwearied.

Of persons, things, etc.: Not wearied, tired, or tired out; also, never becoming weary; indefatigable.

That does not weary or become weary.

Capable of continuing in action for a long time without becoming out of breath; (hence) healthy, fit, robust. Also: prolix, tediously lengthy. Cf. l…

Not exhausted or worn out.

Unexhausted.

Incapable of being wearied; that cannot be tired out; unwearied, untiring, unremitting in labour or effort. Of persons or things personified.

Of persons: With unimpaired strength, not fatigued or worn, fresh. archaic.

Not tired or exhausted; unwearied.

Untiring, indefatigable. Of persons (or their attributes) or other agents.

(un-, prefix1 affix 1b.)

That does not grow or become weary; unremitting, untiring.

Unexhausted.

(un-, prefix1 affix 1b.)

(un-, prefix1 affix 2.)

(un-, prefix1 affix 4.)

Free from deterioration or weakening; unimpaired, fresh.

(un-, prefix1 affix 1b.)

(un-, prefix1 affix 4.)

(un-, prefix1 affix 4.)

Without fatigue; unwearying; tireless.

(un-, prefix1 affix 4)

(un-, prefix1 affix 4.)