Capisce (pronounced cah-PEESH) is an Italian word that is used in American slang to say "got it" or "understand." The correct word in Italian would be capisci (pronounced cah-PEE-shee) to address the second person informally, a.k.a. you. Capisce, in Italian, is used only to address the second person formally (like when speaking to an elder or someone you don't know) or to express that a third person (he, she, it) understands. The correct Italian pronunciation of capisce is cah-PEE-shay.

To say I understand is capisco (cah-PEE-sko).

Italiano Meaning of "Understand?" Often used by popular Mafioso bosses like John 'Dapper Don' Gotti

Do you understand?
Short for 'capisci'

Italiano for "get it?", or "understand?", or "do I make myself clear?". Used commonly by mafioso people.

you do what i say and we still aint friends