不知疲倦 bù zhī pí juàn

DEFINITIONS

  1. untiring
  2. not recognizing tiredness

CHARACTERS

不 bù
HSK 1
no, not; un-; negative prefix
知 zhī
HSK 2
know, perceive, comprehend
疲 pí
HSK 5
feel tired, be exhausted; weak
倦 juàn
HSK 6
be tired of, weary