From Middle English bolken, balken (“to vomit, overflow”), from Old English bealcan (“to belch, utter, bring up, sputter out, pour out, give forth, emit, come forth”), from Proto-Germanic *belkaną (“to belch”). Cognate with Dutch balken & bulken (“to bellow”), German bölken (“to roar”). See also belch.
- (intransitive) To belch.
- (intransitive) To vomit; retch.
- (intransitive) To heave.
- (intransitive) To gush out.
- (transitive) To belch out; give vent to; ejaculate.