湧わかす

godan verb (-su), transitive verb

breed; let breed

Used for deliberately causing insects or other small creatures to multiply, often in a controlled or undesirable context. The intransitive counterpart is 湧く (わく).

• 生なまゴミを放ほう置ちするとハエを湧わかすことになる。

  Leaving kitchen waste out will breed flies.

• 実じっ験けんのためにミールワームを湧わかし