Phrasal Verb: Kick in

Meaning: When a drug starts to take effect

Example: Her hayfever didn't feel half as bad once the antihistamines had KICKED IN.

Meaning: Break something with your feet

Example: They KICKED his head IN.

Meaning: Contribute money

Example: I’ll KICK IN for some of the beer if you will buy the pizza.

Meaning: Start having an effect

Example: The budget cuts are starting to KICK IN and people are struggling.