mutable Antonyms

immutable worthy of trust stabile landline unchangeable unalterable unchanging unimpeachable unfailing trusty trustworthy true sure steady unmodifiable nonreturnable nonreversible as good as one's word deeply ingrained deeply implanted deeply fixed deeply entrenched deeply embedded deeply rooted as steady as a rock unvarying deep-seated deep-rooted bred-in-the-bone 24-7 staunch stationary static firm faithful durable devoted dependable deep dedicated credible constant committed changeless certain black letter fixed graven stable settled