impermanent Antonyms

permanent long-drawn undying unfailing warring well-set unceasing unending unchangeable eonian long-lasting long-term undestroyable timeless termless longeval macrobiotic monomaniacal perpetual perseverant retentive reverseless sempervirent settled sustained longstanding perm yearlong entrenched as solid as a rock deeply rooted deeply embedded deeply entrenched deeply fixed deeply implanted deeply ingrained driven in fixed to a great extent undiscouraged unbendable nonreturnable nonreversible 24-7 age-long bred-in-the-bone deep-rooted deep-seated dog's age god-like life long