"forepart of the head," 1570s, from Latin sinciput "half a head," also "one of the smoked cheeks of a pig," from semi- (see semi-) + caput "head" (from PIE root *kaput- "head"). Related: Sincipital.
Sinai
since
sincere
sincerely
sincerity
sinciput
sine
sine die
sine prole
sine qua non
sinecure
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