indefatigable
Pronunciation:
/ˌɪndɪfəˈtiɡəbəl//ˌɪndɪˈfætɪɡəbl//ˌɪndəˈfætəɡəbəl/adjective
Definitions
Extremely persistent and untiring.
Synonyms:inexhaustiblerelentlesstirelessunflaggingunsinkableuntiringunwearyingAntonyms:defatigable