adj. 25B6; adjective INSIGNIFICANT, inconsequential, trivial, minor, trifling, of little/no importance, of little/no consequence, of no account, irrelevant, peripheral, extraneous, petty, paltry; informal piddling; formal of no moment.
UNIMPORTANT
Meaning of UNIMPORTANT in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012