How to say "limitless" in Japanese

• 無制限むせいげんCommon
  no-adjective, na-adjectiveCovers limitless in the sense of unrestricted: no cap, limit or regulation applies, as with limitless access, spending or use. It is the natural choice when the emphasis is on the absence of restriction rather than vastness.
  もし建物たてものの取り壊とりこわしが無制限むせいげんに行おこなわれるなら、美うつくしい町まちが単たんなるコンクリート・ジャングルになる危険きけんがあるのである。↗

  If the demolition of buildings is uncontrolled, a fine city is in danger of becoming nothing more than a concrete jungle.
• 無限むげんJLPT N2approx.Common
  no-adjective, na-adjectiveCovers limitless in the sense of infinite: something without end or bounds, such as infinite possibility or a boundless quantity. Use it when the idea is endlessness rather than freedom from rules or limits.
  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.
• 極まりないきわまりないCommon
  i-adjectiveMeans boundless or limitless as a descriptive phrase, often of things like the vastness of a universe or ocean. It reads as a literary way of saying something extends beyond all bounds.

Use 無制限 for limitless quantity, scope or freedom from restriction, 無限 for boundlessness in space, time or amount, and 「極まりない」 as a boundless descriptor after nouns in formal description.

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

• 無制限むせいげんunlimited
• 無極むきょくlimitless
• 渺々びょうびょうboundless
• 茫洋ぼうようvast
• 縹渺ひょうびょうboundless
• 無限むげんinfinite
• 極まりないきわまりないboundless (e.g. universe, ocean)