1. (a.) Inclined to persist; having staying qualities; tenacious of position or purpose.

2. (a.) Remaining beyond the period when parts of the same kind sometimes fall off or are absorbed; permanent; as, persistent teeth or gills; a persistent calyx; -- opposed to deciduous, and caducous.

abiding accordant adherent adhesive age-long aged alike ancient antique archaic assiduous automatic balanced beaten booming bound bound and determined bulldogged bulldoggish bulldoggy bullheaded changeless chronic clamant clamorous clingy committed consistent consonant constant continual continuing continuous correspondent crying decided decisive dedicated definite demanding determined devoted diligent diuturnal dogged draining durable earnest echoic echoing enduring equable equal even evergreen exacting exigent exorbitant extortionate faithful fast firm fixed flat frequent frozen gluey glutinous grasping growling gummy habitual hackneyed hardy haunting homogeneous immobile immutable importunate inalterable incessant indefatigable indelible indomitable industrious inflexible insistent instant intact interminable intransient invariable inveterate invincible inviolate lasting level lingering long-lasting long-lived long-standing long-term longeval longevous loud loyal macrobiotic measured mechanical methodic monolithic nagging never-tiring obdurate obsessive obstinate of a piece of long duration of long standing ordered orderly patient patient as Job perdurable perduring perennial permanent perpetual perseverant persevering persisting pertinacious plodding plugging preoccupied pressing purposeful quiescent rapt reboant rebounding recurrent recurring reechoing regular relentless remaining repercussive repetitive resolute resolved resounding reverberant reverberating reverberatory rigid robotlike routine rumbling sedulous self-adhesive sempervirent serious sincere single-minded sleepless slogging smooth solid sounding stable static stationary staunch staying steadfast steady stereotyped stickable sticking sticky stubborn sustained systematic tacky taxing tenacious thundering tireless torpid tough trite unabating unaltered unbroken unceasing unchangeable unchanged unchanging unchecked unconquerable undamped undaunted undestroyed undeveloped undeviating undifferentiated undiscouraged undiversified undrooping undying unending unfading unfailing unfaltering unflagging unflinching unforgettable uniform unintermitting uninterrupted unnodding unrelaxing unrelenting unremitting unruffled unshakable unshifting unsleeping unswerving untiring unvaried unvarying unwavering unwearied unwearying unwinking urgent utterly attentive viscid vital weariless well-trodden well-worn wholehearted