自明(じめい)

じめい
na-adjective, noun
self-evident; obvious; axiomatic
formalabstract
1. self-evident; obvious; clear without proof
Something so obvious that it requires no explanation or proof. Used in both academic/logical contexts and everyday speech to mean something is undeniably clear.
それは自明(じめい)のことだ。
That is self-evident.
努力(どりょく)なしに成功(せいこう)はないのは自明(じめい)の理(り)だ。
It is an obvious truth that there is no success without effort.
地球(ちきゅう)温暖化(おんだんか)が進(すす)んでいることは、もはや自明(じめい)と言(い)えるだろう。
It can now be said to be self-evident that global warming is progressing.

A somewhat formal word meaning something is so clear it needs no proof or explanation. Common in academic, logical, and argumentative contexts.

Common collocations

  • 自明(じめい)の理(り): self-evident truth; truism
  • 自明(じめい)のこと: something obvious
  • 自明(じめい)な事実(じじつ): self-evident fact

Similar words

Forms

自(じ) (self) + 明(めい) (clear, bright) — clear by itself, without external proof.

Related Words

Compare: 明白(めいはく) (obvious, clear)
Compare: 明(あき)らか (clear, evident)
Compare: 当然(とうぜん) (natural, of course)
Compare: 論(ろん)をまたない (goes without saying)
general
Added 2026.4.2 0:24 · Revised 2026.9.2 13:02
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