うすばふゆうでわありません
薄羽蜉蝣ではありません
usuba fuyūdewārimasen

Noun
Desu Copula
Negation Auxiliary

The polite negative form of うすばかげろう

1. Is not a mayfly.; Is not thin feathers.

Negative
Polite
Formal Register
Usually Written in Kana