Home › Words › U › unsettlerunsettlerunsettler · noun — A person or thing that unsettles.Definition from Wiktionary (CC BY-SA 3.0).Among words judged in Lexicurio's Arena, unsettler ranks #11,302 of 43,010 for Qualifying.EtymologyUnsettle + -ernounA person or thing that unsettles.Definitions & examples from Wiktionary (CC BY-SA 3.0).