adj. 25B6; adjective TEMPORARY, transient, transitory, passing, fleeting, momentary, ephemeral, fugitive; short-lived, brief, here today and gone tomorrow; poetic/literary evanescent.
IMPERMANENT
Meaning of IMPERMANENT in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012