commater

From com- (“joint”) +‎ māter (“mother”).

• (Classical Latin) IPA^(key): /komˈmaː.ter/, [kɔmˈmäːt̪ɛr]
• (modern Italianate Ecclesiastical) IPA^(key): /komˈma.ter/, [komˈmäːt̪er]

commāter f (genitive commātris); third declension

1. (Late Latin) godmother (in relation to godchild or fellow godparent or parent)
2. (informal) a female companion, buddy

Third-declension noun.

• compater

• commater in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.