氷河ひょうが決壊けっかい洪水こうずいでしょう
hyōga kokekkaikōzuideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 氷河湖決壊洪水

1. Likely a glacial lake outburst flood.; Possibly a glacial lake outburst flood.

Polite
Presumptive
Conjecture