すごい
すごい
adjective (i-adjective)
amazing, incredible
1.
amazing, incredible, awesome
Expressing that something is impressive, remarkable, or extraordinary. Very commonly used in casual conversation.
She has an incredible talent for languages—apparently she can speak five languages.
2.
terrible, dreadful
Originally meant something frightening or extreme (can still be used this way).
The typhoon winds were terrible, so we couldn't go outside. Apparently several trees fell over too.
Uses sense 2: terrible/dreadful
すごい conjugates as an i-adjective: すごくない (negative), すごくて (te-form), すごかった (past). The kanji 凄い can be used but hiragana is more common. In casual speech, すごく is often used as an intensifier meaning 'very' (e.g., すごくおいしい - very delicious). Young people often say すげー as a casual variant.