Definition of root
the
place where something begins, where it springs into being; "the Italian
beginning of the Renaissance"; "Jupiter was the origin of the radiation"; "Pittsburgh is the
source of the Ohio River"; "communism's Russian root"
(linguistics) the
form of a
word after all affixes are removed; "thematic vowels are
part of the stem"
dig with the snout; "the pig was
rooting for truffles"