With the accent it's "a chara mo chroí" and it is "friend of my heart" when addressing someone.
Actually "mo chara" simply means "my friend", "mo" means "my" and "chara" means "friend"
MO CHROÍ means "My Heart" in Irish Gaelic.
Cuisle mo chroí the anglicised meaning is "pulse of my heart". Sometimes "cuisle" may be spelled "chuisle". This aspiration occurs when it is being used as a form of address, following the vocative...
"trócaire mo chroí" means "mercy of my heart"
My Heart My Family