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わあ， わあっ， わっ
1. wow!, oh!, eek!, gee!
2. yeah!, alright!, hurray!
3. waah!, boohoo!
tbd
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すっごい， すんごい， スッゴイ， スンゴイ， スッゴい， スンゴい
1. terrible, dreadful
2. amazing (e.g. of strength), great (e.g. of skills), wonderful, terrific
3. to a great extent, vast (in numbers)
tbd