constant; habitual; inveterate

a chronic liar.

continuing a long time or recurring frequently

a chronic state of civil war.

having long had a disease, habit, weakness, or the like

a chronic invalid.

(of a disease) having long duration ( opposed to acute ).

adjective

curable , eradicable , intermittent , occasional , temporary

adjective

abiding , ceaseless , confirmed , constant , continual , continuing , continuous , deep-rooted , deep-seated , enduring , ever-present , fixed , habitual , inborn , inbred , incurable , ineradicable , ingrained , inveterate , lasting , lifelong , lingering , long-lived , long-standing , obstinate , perennial , persistent , persisting , prolonged , protracted , recurrent , recurring , rooted , routine , settled , stubborn , sustained , tenacious , unabating , unmitigated , unyielding , [[usualnotes:acute is used for a sudden onset and short duration; chronic is for conditions that are slow to develop and of long durationchronic is contrasted with acute as chronic pain persists over a longer period of time than acute pain and is resistant to most medical treatments]] , habituated , incessant , intense , intractable , irradicable , severe , usual