asymptote

circa 1650, from Ancient Greek ἀσύμπτωτη (asúmptōtē), the feminine of Apollonius Pergaeus' (circa 200 BC) Ancient Greek adjective ἀσύμπτωτος (asúmptōtos, “not falling together”), from ἀ- (a-, “not”) +‎ συν- (sun-, “together”) +‎ πτωτός (ptōtós, “fallen”). See also a-, syn-, -ote.