出没无常 chū mò wú cháng

DEFINITIONS

  1. to appear and disappear unpredictably

CHARACTERS

出 chū
HSK 1
go out, send out; stand; produce
没 mò
HSK 1
not, have not, none; drown, sink
无 wú
HSK 4
negative, no, not; KangXi radical 71
常 cháng
HSK 2
common, normal, frequent, regular