Root

mot souche

(philology: word from which another word or words are derived)

origine

(primary source)

racine

(part of a plant)

racine

(of a tooth)

racine

(part of a hair under the skin)

racine

(primary source)

racine

(arithmetic: number or expression which when raised to a power gives the specified number or expression)

racine

(analysis: zero of a function)

racine

(linguistic morphology: primary lexical unit of a word)

racine

(philology: word from which another word or words are derived)

radical

(linguistic morphology: primary lexical unit of a word)

root

(person who manages accounts on a UNIX system)

emmancher

(coarse slang: to have sexual intercourse)

fourrer

(coarse slang: to have sexual intercourse)