Ganef is slang and is defined as a thief or scoundrel.
(noun)An example of a ganef is a burglar.
See ganef in Webster's New World College Dictionary
noun
Origin: Yiddish ganef < Heb ganav < ganav, to steal
See ganef in American Heritage Dictionary 4
or ga·nof also gon·if
nounOrigin:
Origin: Yiddish
Origin: , from Hebrew gannāb, to steal; see gnb in Semitic roots
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