Home › Words › U › unchildishnessunchildishnessunchildishness means the quality of being unchildish.Among words judged in Lexicurio's Arena, unchildishness ranks #25,956 of 42,785 for Qualifying.EtymologyFrom unchildish + -ness.nounThe quality of being unchildish.e.g.“Your unchildishness is something your husband has always loved in you.” — 2022, Jennifer Egan, The Candy House, Corsair, page 212:Definitions & examples from Wiktionary (CC BY-SA 3.0).