French word singe comes from Ancient Greek σιμός, and later Latin simus (Flattened, splayed. Snub-nosed.)
σιμός (Ancient Greek)
simus (Latin)
Flattened, splayed. Snub-nosed.
simia (Latin)
(pejorative, of a person) monkey. An ape, monkey. An imitator.
simium (Latin)
singe (French)
Ape. Monkey.