ばあえぼしかいでしょう
姥烏帽子貝でしょう
bā eboshikaideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of おばえぼしがい

1. Probably an Obukesa shell.

Polite
Presumptive
Conjecture
Usually Written in Kana