Learn Finnish: Makea herkku piristää minua usein. - A sweet treat often cheers me up.

Instead of using tehdä (to make), Finnish often uses a single verb that already carries the meaning of "to make [adjective]". The verb piristää means "to cheer someone up". If you wanted to use this lesson's exact grammar, you could rephrase the sentence as Makea herkku tekee minut pirteäksi.

Does the verb piristää share a root with an adjective?

Yes! It comes from the adjective pirteä (cheerful, energetic, alert). In Finnish, adding the -stää ending to an adjective often creates a verb that means "to make someone [adjective]". This is a very natural alternative to using the tehdä + translative structure.

Why is the object minua in the partitive case instead of the accusative?

Verbs that describe emotions, feelings, or psychological effects usually take a partitive object in Finnish. Because cheering someone up (piristää) is an ongoing emotional effect rather than a completed physical action with a clear endpoint, it requires the partitive minua.