How to say "incredibly" in Japanese

• 唸るほどうなるほど
  expression, noun, adverbA less common expression: it covers 'incredibly' only in the sense of extreme degree, as in incredibly tasty or incredibly much, and otherwise means having money to burn — not an all-purpose intensifier.
  うなるほど金かねを持もっている。↗

  He's in the money.
• すごく
  adverbA general-purpose intensifier meaning 'extremely; very; terribly; awfully'; for the plain sense of 'incredibly' this is the word you will usually want, and it is usually written in kana alone.
  「スーはあなたのことすごく怒おこっているわよ」そのウェイトレスは言いうのであった。↗

  "Sue's very angry with you," my new waitress said.
• すっごく
  adverbIdentical in meaning to すごく — 'extremely; very; terribly; awfully' — but colloquial and emphatic; reach for it in relaxed conversation rather than in writing or formal situations.
• ものっそい
  adverbSlang for 'incredibly; tremendously; terrifically'; its slangy flavor keeps it to casual, informal speech, so it is not a neutral choice for 'incredibly'.

Choose 「すごく」 for the plain sense of 'incredibly', 「すっごく」 in casual talk, 「ものっそい」 when slang is welcome, and 「唸るほど」 only for extreme degree, as in incredibly tasty or incredibly much.

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

• 唸るほどうなるほどto a great extent
• すごくextremely
• すっごくextremely
• ものっそいextremely
• めちゃくちゃincredibly
• ばかincredibly