Meaning of 悽愴凄 in Japanese

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Definition of 悽愴凄

すごい(sugoi) 【凄い】

(adj-i) terrible; dreadful
amazing (e.g. of strength); great (e.g. of skills); wonderful; terrific
すごいぞ！
Terrific!
to a great extent; vast (in numbers)
マドンナのコンサートはすごい数の客を集めた。
Madonna's concert drew a large audience.

せいそう(seisou) 【悽愴 ·凄愴】