convincingness en · NOUN
Etymology
Etymology tree English convincing Proto-Germanic *-inōną Proto-Indo-European *-dyé- Proto-Germanic *-atjaną Proto-Indo-European *-tus Proto-Germanic *-þuz Proto-Germanic *-assuz Proto-Germanic *-inassuz Proto-West Germanic *-nassī Old English -nes Middle English -nesse English -ness English convincingness From convincing + -ness.
Meanings
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(uncountable) The state or quality of being convincing.
The substance of the note was wholly insane, yet the manner of expression—in view of all that had gone before—had a grimly potent quality of convincingness.
1931, H. P. Lovecraft, chapter 4, in The Whisperer in Darkness: