n. 25B6; adjective ABIDING, enduring, lasting, everlasting, perpetual, eternal, continuing, unending, unceasing, never-ending, endless, undying, ceaseless, persisting, permanent, constant, continual, unfailing, unchanging, never-changing.
PERENNIAL
Meaning of PERENNIAL in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012