Synonyms of unretiring

1 Syllable
staunch
2 Syllables
fixed, constant, steady
3 Syllables
active, unflagging, tireless, diligent, unfailing, assiduous, unwearied, dynamic, untiring, unceasing
4 Syllables
unrelenting, unfaltering, unremitting, undeviating, persevering, energetic
5 Syllables
inexhaustible
6 Syllables
indefatigable