b.transitive. to boil forth: to give forth in a boiling or agitated manner.
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society > leisure > the arts > literature > style of language or writing > copiousness > express copiously [verb (transitive)] > pour out or multiply (words, etc.)
multiply1340
lash1529
to boil forth1610
1610 Bible (Douay) II. Prov. xv. 2 The mouth of fooles boyleth forth follie.