How to say "infinite" in Japanese

• 無辺むへんCommon
  na-adjective, nounCovers the 'boundless' side of 'infinite', suggesting a vast expanse stretching without edge. It suits poetic or descriptive writing about space, sky, or scenery rather than technical or numerical infinity.
• 無量むりょうCommon
  no-adjectiveCenters on the 'immeasurable, inestimable' sense: a quantity so great it cannot be counted or measured. It fits grand, often elevated descriptions of amount, and is not the usual choice for abstract or mathematical infinity.
• 限りないかぎりないCommon
  i-adjectiveMeans 'without limit', covering the endless, boundless, and infinite senses in everyday description. It works naturally as a predicate or modifier for things felt as having no end, such as possibilities or affection.
• 無限むげんJLPT N2approx.Common
  no-adjective, na-adjectiveThe most direct equivalent of 'infinite', covering both the limitless and the mathematical sense. When you need a plain noun or modifier for infinity itself, as in numbers, space, or potential, this is typically the word to reach for.
  石油せきゆの供給きょうきゅうは無限むげんではない。↗

  Supplies of oil are not infinite.

For the abstract or mathematical sense of 'infinite', 無限 is the default; 「限りない」 works well in descriptions, while 無辺 and 無量 lean toward boundless expanse and immeasurable quantity respectively.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 無辺むへんinfinite
• 無量むりょうimmeasurable
• 限りないかぎりないunlimited
• インフィニットinfinite
• 無辺際むへんさいinfinite
• 無現むげんinfinite
• 底なしそこなしbottomless
• 広大無辺こうだいむへんboundless
• 無限むげんinfinite