Patri is defined as father.
An example of patri used as a prefix is the word patrilineal, tracing descent through the father's side of the family tree.
also, before a vowel, patr-
Origin of patri-Classical Latin from Classical Greek patri- from pat?r, father
Father, paternal: patrilineal.
Origin of patri-Latin ( from pater patr- father )Greek ( from patēr patr- father ); see pəter- in Indo-European roots.