スッゴイ Also written すっごい, すんごい, スンゴイ, スッゴい, スンゴい Meanings い-adjective terrible; dreadful See also: すごい. amazing (e.g. of strength); great (e.g. of skills); wonderful; terrific See also: すごい. to a great extent; vast (in numbers) See also: すごい. Word lists Colloquial Jinuma: Japanese Dictionary · Word lists