永久不変 えいきゅうふへん Meanings Noun, な-adjective, の-adjective permanence; forever unchanging Kanji 永 eternal. Read as エイ. 久 long time. Read as キュウ. 不 un- 変 change. Read as ヘン. Word lists Yojijukugo (四字熟語) Jinuma: Japanese Dictionary · Word lists