Meaning of AXIOMATIC in English

AXIOMATIC

/ ˌæksiəˈmætɪk; NAmE / adjective

[ not usually before noun ] ( formal ) true in such an obvious way that you do not need to prove it

SYN self-evident :

It is axiomatic that life is not always easy.

►  axio·mat·ic·al·ly adverb

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WORD ORIGIN

late 18th cent.: from Greek axiōmatikos , from axiōma what is thought fitting, from axios worthy.

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