persisting, esp. in spite of opposition, obstacles, discouragement, etc.; persevering

a most annoyingly persistent young man.

lasting or enduring tenaciously

the persistent aroma of verbena; a persistent cough.

constantly repeated; continued

persistent noise.

Biology .

continuing or permanent.

having continuity of phylogenetic characteristics.

Botany . remaining attached beyond the usual time, as flowers, flower parts, or leaves.

adjective

lazy , relenting , surrendering , yielding

adjective

assiduous , bound , bound and determined , bulldogged , constant , continual , dogged , endless , enduring , firm , fixed , immovable , incessant , indefatigable , in for long haul , insistent , interminable , like bad penny , never-ending , obdurate , obstinate , perpetual , perseverant , persevering , persisting , pertinacious , relentless , repeated , resolute , steadfast , steady , sticky * , stubborn , tenacious , tireless , unflagging , unrelenting , unremitting , unshakable , importunate , importune , urgent , around-the-clock , ceaseless , continuous , eternal , everlasting , nonstop , ongoing , round-the-clock , timeless , unceasing , unending , unfailing , uninterrupted , abiding , durable , lasting , long-lasting , long-lived , long-standing , old , perdurable , perennial , permanent , continuing , lingering , prolonged , protracted , consistent , contumacious , determined , diligent , gritty , sedulous , sustained