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incisive

/ɪnˈsaɪ.sɪv/ adjective

Latin root: incīsīvus Wiktionary

Origin

Late Middle English (in the sense “cutting, penetrating”), borrowed from Medieval Latin incīsīvus, from incīdō (“to cut in, cut through”) + -īvus (“-ive”, adjectival suffix). Compare Middle French incisif.

From Wiktionary, via Kaikki.org (CC BY-SA)