1660s, "church benefice with an emolument but without parish duties," from Medieval Latin beneficium sine cura "benefice without care" (of souls), from Latin sine "without" (see sans) + cura, ablative singular of cura "care" (see cure (n.1)).
sinciput
sine
sine die
sine prole
sine qua non
sinecure
sinew
sinewy
sinfonia
sinful
sing