ㄅㄨˊㄐㄩㄢˋzīzī‑bújuàn

zīzī‑bùjuànㄗ ㄗ ㄅㄨˋ ㄐㄩㄢˋ
  1. 形容勤奮努力疲倦 孜孜不倦從事文字研究」。

lit. diligent and never slacking (idiom)​; continuous concentrated effort, assiduous (in study)​, to concentrate
inlassablement, assidûment
emsig (Adj)​