不変ふへん
fuhen

Noun
na-Adjective
no-Adjective

1. eternal; everlasting; unchangeable; immutable; immovable; constant; permanent; indestructible

Antonym of 可変
これ不変ふへん真理しんりなり。
korefuhenno shinrinari.
This is an immutable truth.
Noun

2. invariant

Mathematics