Home › Words › U › unsisterlinessunsisterlinessunsisterliness means the state or quality of being unsisterly.Among words judged in Lexicurio's Arena, unsisterliness ranks #36,606 of 42,747 for Qualifying.EtymologyFrom unsisterly + -ness.nounThe state or quality of being unsisterly.e.g.“Don’t let me be surprised at your seeming unsisterliness, Bella. I hope it is but seeming. There can be no wit in such jesting as this.” — 1748, [Samuel Richardson], “Letter XLII”, in Clarissa. Or, The History of a Young Lady: […], volume I, London: […] S[amuel] Richardson; [a]nd sold by A[ndrew] Millar, […], →OCLC:Definitions & examples from Wiktionary (CC BY-SA 3.0).