ごく ちょう音速 おんそく滑空 かっくう兵器 へいきでしょう
gokuchōonsokukakkūe ikideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 極超音速滑空兵器

1. Probably a hypersonic glide vehicle.

Polite
Presumptive
Conjecture
Military