abiding age-long aged amaranthine ancient antique changeless chronic colorfast constant continuing deathless deep-dyed diuturnal double-dyed durable dyed-in-the-wool embalmed enduring ever-fresh evergreen everlasting fadeless fast firm fixed frozen hardy immobile immortal immutable imperishable incorruptible indelible ingrain ingrained intact intransient inveterate inviolate lasting long-lasting long-lived long-standing long-term longeval longevous macrobiotic never-dying of long duration of long standing perdurable perduring perennial permanent perpetual persistent persisting quiescent remaining rigid sempervirent solid stable static stationary staying steadfast sustained torpid tough unaltered unchangeable unchanged unchanging unchecked undestroyed undying unfailing unshifting unvaried unvarying vital