kick in

INFORMAL

Meaning: If something kicks in, it starts to work or it starts to have an effect.

Synonym: take effect

For example:

  • kick in I took some pills for the pain and after about half an hour I could feel them kicking in.

  • kick in The effect of last year's tax cuts should kick in soon and start boosting the economy.

Quick Quiz:

This medicine will make your temperature go down, but it takes about an hour to kick in. It doesn't work

a. unless you kick

b. straight away

c. very well

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Contributor: Matt Errey