How to say "extreme" in Japanese

• 極端きょくたんJLPT N1approx.Common
  noun, na-adjectiveCovers the noun 'extreme' or 'extremity': the far end of a range or scale. It is the natural choice for opposite extremes, for going to extremes, and for describing opinions or behavior as extreme.
  君きみの言いうことは極端きょくたんじゃないか。↗

  Aren't you pushing it too far?
• 過激かげきCommon
  na-adjective, nounMatches 'extreme' for measures, ideas and the like: radical, drastic, going beyond what is acceptable. It also covers violent or harsh language, so it suits radical claims, drastic action or inflammatory wording.
  彼かれの考かんがえは私には過激かげきすぎます。↗

  His ideas are too extreme for me.
• 極度きょくどCommon
  no-adjective, na-adjectiveCovers 'extreme' as maximum or utmost: a state or condition taken to its highest degree. Use it when 'extreme' describes how intense something is, not which end of a range it occupies.
  人間にんげんも極度きょくどに寒さむい温度おんどに対たいしては、防御ぼうぎょ装置そうちを備そなえている。↗

  Man, too, has been given protective devices against extreme temperatures.
• 超ちょうJLPT N1approx.Common
  prefixA prefix meaning 'super-', 'ultra-' or 'hyper-': use it when 'extreme' is simply an emphatic intensifier on another word. It is not how you describe extreme opinions, measures or conditions.
  超ちょう高速こうそくがコンコルド機きの特徴とくちょうだ。↗

  Great speed is a feature of the Concorde.
• 甚だしいはなはだしいJLPT N2approx.Common
  i-adjectiveAn adjective for 'extreme' as excessive or terrible: a degree far beyond what is acceptable. It stresses how egregious or intense something is, rather than where it falls on a scale.
  あんなことを彼女かのじょに言ゆうなんて非常識ひじょうしきも甚はなはだしい。↗

  It's quite absurd of you to tell her that sort of thing.

Use 極端 for the noun 'extreme' — opposite ends of a range or going to extremes; 過激 for radical measures, ideas or violent language; 極度 for utmost degrees of states; 超 as an emphatic prefix; 「甚だしい」 for excessive, egregious degrees.

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

• 極端きょくたんextreme
• 過激かげきextreme (measure, idea, etc.)
• 極度きょくどmaximum
• 超ちょうsuper-
• 甚だしいはなはだしいextreme
• 極点きょくてんpole (north, south)
• ものすごいterrific
• エクストリームextreme
• べらぼうextreme
• どextreme
• すこぶるつきextreme
• 矯激きょうげきradical
• 度を越したどをこしたextravagant
• 災害級さいがいきゅうdisaster-level (heat, rainfall, etc.)
• だだover-
• どぎついgaudy
• ものっそいterrific
• 非常ひじょうextreme
• めちゃくちゃextreme
• めちゃexcessive
• 激しいはげしいextreme
• 劇的げきてきextreme
• たいそうextreme
• 無茶むちゃexcessive
• 底抜けそこぬけunbounded (good nature, optimism, etc.)
• ひどいviolent
• 強度きょうどstrong (e.g. glasses)
• 重じゅうserious
• ごついextreme
• 猛もうextreme
• 極きょくclimax
• はちゃめちゃextreme
• しきりgreat
• あまりextreme
• きついextreme
• 熱いあついintense
• やばいcrazy
• あんましextreme
• いいとこutter