不可或缺 bù kě huò quē

DEFINITIONS

  1. necessary
  2. must have

CHARACTERS

不 bù
HSK 1
no, not; un-; negative prefix
可 kě
HSK 2
may, can, -able; possibly
或 huò
HSK 3
or, either, else; perhaps, maybe
缺 quē
HSK 4
be short of, lack; gap, deficit