Meaning of 不変理 in Japanese

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Definition of 不変理

ふへん(fuhen) 【不変】

(adj-na, n, adj-no) eternal; everlasting; unchangeable; immutable; immovable; constant; permanent; indestructible
これ不変の真理なり。
This is an immutable truth.

り(ri) 【理】

(n) reason; principle; logic
(Buddh) general principle (as opposed to individual concrete phenomenon) →Related words: 事
(in neo-Confucianism) the underlying principles of the cosmos

ことわり(kotowari) 【理り ·理】