歯黒 はぐろ蜻蛉 かげろうではありませんでした
ohagurokagerōdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 御歯黒蜻蛉

1. Was not a black dragonfly.; Was not an elegant/refined person.

Past/Perfective
Negative
Polite
Formal Register