un fils Learn Unstarted Literal Breakdown Recording English French Learn a (masculine) un Learn son fils Learn Summary The French translation for “a son” is un fils. The French, un fils, can be broken down into 2 parts:"a (masculine)" (un) and "son" (fils). Practice Lesson "a son" Practice (3) Lesson Learn Lesson words a (masculine), son etc. View all lesson words Lesson phrases a son etc. View all lesson phrases Themed Courses Family 1 Part of Speech Courses Nouns 2