平白无故 píng bái wú gù

DEFINITIONS

  1. without good cause

CHARACTERS

平 píng
HSK 3
flat, level, even; peaceful
白 bái
HSK 2
white; pure, unblemished; bright
无 wú
HSK 4
negative, no, not; KangXi radical 71
故 gù
HSK 3
ancient, old; reason, because