Dictionary/違憲いけんIken違憲 (Iken) is a Japanese noun meaning “unconstitutionality”.MeaningsnoununconstitutionalityKanji in 違憲違difference憲constitutionRelated words違うto differ (from)間違うto be mistaken間違いないcertain間違えるto make a mistake (in)勘違いmisunderstanding違反violation違法illegal違和感uncomfortable feeling人違いmistaking one person for another違いないsure見違えるto mistake (for something or someone else)相違difference