CONCLUSIVE, CONCLUSIVELY
ADJECTIVES
► CONCLUDENT conclusive, decisive, convincing; that ‘concludes’ a question or an opponent → 1571 obs.
► DECISIONAL conclusive, decisive; of the nature of a decision → 1883
► DECRETORIAN conclusive, decisive → 1679 obs.
► EFFECTUAL conclusive, to the point, pertinent → 1593 obs.
ADVERBS
► PEREMPTOR conclusively, categorically → 1838 obs.
► PEREMPTORILY so as to settle or decide a matter, question, etc.; decisively, conclusively → 1582
NOUNS
► BONER a conclusive stroke; the ‘last straw’ → 1969 Amer. dial.
► GAGGER a conclusive argument or reply → 1839 Eng. dial.
Lexicophilia 