Definition of chronic:
inborn, unceasing, lingering, rooted, lasting, habitual, fixed, ingrained, deep-rooted, continue, stubborn, inveterate, continued, continuous, uncured, of long duration, persistent, deep-seated, incurable, intermittent, long-lived, persistent, ceaseless, perpetual, persisting, inbred, unabating, recurring, tenacious, ever-present, continuing, prolonged, settled, obstinate, unyielding, protracted, sustained, incorrigible, lingering, enduring, abiding, confirmed, incessant, lifelong, long-standing, permanent, perennial, habituated, degenerative, hardened, protracted, addicted.
regular (part of speech: adjective)
- "The Memoires of Casanova, Complete The Rare Unabridged London Edition Of 1894, plus An Unpublished Chapter of History, By Arthur Symons", Jacques Casanova de Seingalt.
- "Health Through Will Power", James J. Walsh.
- "Project Gutenberg History of The Netherlands, 1555-1623, Complete", John Lothrop Motley.