expression, adverb
untiringly; persistently; without getting bored
Fixed phrase from 飽きる (to get tired of) in the negative continuative form. Describes doing something repeatedly or for a long time without losing interest or enthusiasm. Often carries a nuance of mild surprise or admiration.
See also: 飽きる
彼は飽きもせず毎日同じゲームをしている。
He plays the same game every day without getting tired of it.
飽きもせずまた新しい趣味を始めた。
She started yet another new hobby, never losing interest.