Meaning of TRIVIAL in English

TRIVIAL

/ ˈtrɪviəl; NAmE / adjective

not important or serious; not worth considering :

a trivial detail

I know it sounds trivial , but I'm worried about it.

I'll try to fix it—but it's not trivial (= it may be difficult to fix) .

►  trivi·al·ly / -iəli; NAmE / adverb

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WORD ORIGIN

late Middle English : from medieval Latin trivialis , from Latin trivium place where three roads meet.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.