arrestarli

to arrest them

→ arrestare
arrestar to arrest + li plural object pronoun
verb · plural Rare #45,741
to arrest them The ending -li means “them.”
IT: La polizia vuole arrestarli.
EN: The police want to arrest them.
Conjugation of arrestare

Ho dovuto arrestarli.

I had to arrest them.

Non è meglio aspettare gli altri per arrestarli?

Isn't it better to wait for the others to arrest them?

— Young Detective Dee - Il risveglio del drago marino (2013)

Ed arrestarli.

And arrest them.

— Lo Hobbit: La desolazione di Smaug (2013)

Dovresti arrestarli.

You should arrest them.