indefatigable
🇺🇸
/ˌɪndɪˈfætɪɡəbl/
🇬🇧
/ˌɪndɪˈfætɪɡəbl/
always being able to continue doing something without getting tired
Her indefatigable spirit helped her overcome every challenge.
彼女の不屈の精神が、あらゆる挑戦を乗り越えるのを助けた。