IPA: /ˈtaɪərləsnəs/
KK: /ˈtaɪərləsnəs/
The quality of being able to work or continue without getting tired.
Her tirelessness in pursuing her goals inspired everyone around her.
Tirelessness → It is formed from "tire" (from Old French *tirer*, meaning to pull or draw) and the suffix "-lessness" (meaning without). The word "tirelessness" means the state of being without fatigue or weariness, indicating an ability to continue without tiring.
Think of being 'without' ('-lessness') the ability to 'tire' ('tirer'), which helps you remember that tirelessness means not getting tired.