bolk

1. To belch.
2. To vomit; retch.
3. To heave.
4. To gush out.
5. To belch out; give vent to; ejaculate.

Etymology

Inherited from Middle English: bolken

Inherited from Old English: bealcian

Cognate with Dutch: balken

Cognate with German: bölken

In summary

From Middle English bolken, balken (“to vomit, overflow”), from Old English bealcian (“to belch, utter, bring up, sputter out, pour out, give forth, emit, come forth”), from Proto-Germanic *balkōną, *belkaną (“to belch”), ultimately imitative. Cognate with Dutch balken, bulken (“to bellow”), German bölken (“to roar”). See also belch.