From Wiktionary, the free dictionary
From ហើប (haəp, “to be ajar, slightly open”) with prefixed bVN- (causative).
បង្ហើប • (bɑnghaəp) (abstract noun ការបង្ហើប)
- to open a little (a door), to raise / lift slightly (a lid)
- (figuratively) to give a hint, to leak a secret