ものともせず

Meanings

undaunted by; in defiance of; ignoring

usually written using kana alone

Used in the pattern ...をものともせず（に） to describe acting without being deterred by difficulty, danger, or opposition. Often found in formal or literary contexts.

彼かれは困こん難なんをものともせずに前ぜん進しんした。
He pushed forward undaunted by the difficulties.
選せん手しゅはけがをものともせず試し合あいに出でた。
The athlete played in the match in defiance of the injury.