无缘无故 wú yuán wú gù

DEFINITIONS

  1. no cause, no reason (idiom); completely uncalled for

CHARACTERS

无 wú
HSK 4
negative, no, not; KangXi radical 71
缘 yuán
HSK 6
hem, margin; reason, cause; fate
无 wú
HSK 4
negative, no, not; KangXi radical 71
故 gù
HSK 3
ancient, old; reason, because