Home › Words › U › unhealthfulnessunhealthfulnessunhealthfulness means the state or quality of being unhealthful.Among words judged in Lexicurio's Arena, unhealthfulness ranks #40,634 of 42,749 for Qualifying.EtymologyFrom unhealthful + -ness.nounThe state or quality of being unhealthful.Definitions & examples from Wiktionary (CC BY-SA 3.0).