Home › Words › U › underfamiliarityunderfamiliarityunderfamiliarity means the state of being underfamiliar.Among words judged in Lexicurio's Arena, underfamiliarity ranks #36,242 of 42,791 for Qualifying.EtymologyFrom under- + familiarity.nounThe state of being underfamiliar.Definitions & examples from Wiktionary (CC BY-SA 3.0).