1) 不変ふへん Parts 不 変 #27,237 Inflections of 不変 Class Na-adjective Stem Inflected ending ✕ Link copied! Common ふへん [0] Meaning Shirabe ① Na-adjective No-adjective Noun eternal; everlasting; unchangeable; immutable; immovable; constant; permanent; indestructible Antonym: 可変 (かへん) これ不変ふへんの真理しんりなり。 This is an immutable truth. ② Noun mathematics invariant Kanji 不 フ negative, non-, bad 変 ヘン unusual, change, strange Forms 不変#27,237不変ふへんふへんふへん