treacherousness

English

Etymology

Etymology tree

English treacherous

Proto-Germanic *-in-

Proto-Indo-European *-h₂

Proto-Indo-European *-éh₂

Proto-Indo-European *-yéti

Proto-Indo-European *-eh₂yéti

Proto-Indo-European *-h₂ti

Proto-Germanic *-ōną

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 treacherousness

From treacherous + -ness.

Noun

treacherousness (uncountable)

1. Treachery; the characteristic of being treacherous.

   Synonyms: perfidiousness, traitory, treason; see also Thesaurus:betrayal

   • 1901, Bret Harte, “Under the Eaves”, in Under the Redwoods:

     He had an aggressive treacherousness of eye which his potations had not subdued.

References

• Noah Webster (1828), “treacherousness”, in An American Dictionary of the English Language: […], volume II (J–Z), New York, N.Y.: […] S. Converse; printed by Hezekiah Howe […], →OCLC.
• “treacherousness”, in Dictionary.com Unabridged, Dictionary.com, LLC, 1995–present.