ἀντίκρουσις
From LSJ
ἀκμὴ οὐδὲ ἔχει γενέσεως ὑπόστασιν καθ' ἑαυτήν → the culmination has no power of originating by itself
English (LSJ)
εως, ἡ,
A abrupt close, in a rhetorical period, Arist. Rh.1409b22; hindrance, check, Plu.2.721b; dub. sens. in Aeschin. 1.168, perh. repartee.