momentary Antonyms

greatly fixed dog's age deep-seated deep-rooted bred-in-the-bone 24-7 longstanding long-lasting eonian unending unforgettable undying undestroyable game-changing god-like life long fixed to a great extent driven in deeply ingrained deeply implanted deeply fixed deeply entrenched deeply embedded deeply rooted entrenched yearlong timeproof permed timeless sustained settled firm fadeless extended everlasting evergreen eternal engrained enduring endless deep deathless dateless fixed godlike great perpetual permanent long-lived long-drawn