Home › Words › U › unkillablenessunkillablenessunkillableness means the state or condition of being unkillable.Among words judged in Lexicurio's Arena, unkillableness ranks #10,511 of 42,762 for Qualifying.EtymologyFrom unkillable + -ness.nounThe state or condition of being unkillable.Definitions & examples from Wiktionary (CC BY-SA 3.0).