三釁三沐 [－衅－－]

Jyutping saam1 jan6 saam1 muk6
Pinyin sān xìn sān mù

Definitions (Wiktionary)
  1. phrase, idiomatic
    to be respectful; to be courteous
    (syn.) 三沐三熏, 三薰三沐, 三沐三薰, 三熏三沐