す
　
ご
　
い

adjective

Usually written with kana alone.
  1. terrible, dreadful.
  2. amazing (e.g. of strength), great (e.g. of skills), wonderful, terrific.
  3. to a great extent, vast (in numbers).

adverb

Usually written with kana alone, colloquialism.
  1. awfully, very, immensely.

Variations

Pronunciation Kanji Kana Is Common
　
す
　
ご
　
い
 すごい ✔
すご
凄
　
い
 凄い すごい ✔
　
ス
　
ゴ
　
イ
 スゴイ ✔
　
ス
　
ゴ
　
い
 スゴい