爆発がとてもすさまじかったので、屋根が吹っとんだ。

Such was the explosion that the roof was blown off.

爆発(ばくはつ)がとてもすさまじかったので、屋根(やね)が吹(ふ)っとんだ。

Bakuhatsu ga totemo susamajikatta node, yane ga futtonda.

爆発 (ばくはつ)

explosion; detonation; eruption

が (が)

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

迚も (とても、とっても)

very; awfully; exceedingly; (not) at all; by no means; simply (cannot)

凄まじい (すさまじい)

terrific; fierce; terrible; tremendous; dreadful; awful; amazing; absurd; cutthroat; intense

ので (ので、んで)

that being the case; because of ...; the reason is ....; given that...

屋根 (やね)

roof

Readings: バク、は.ぜる

Meanings: bomb, burst open, pop, split

Readings: ハツ、ホツ、た.つ、あば.く、おこ.る、つか.わす、はな.つ

Meanings: departure, discharge, publish, emit, start from, disclose, counter for gunshots

Readings: オク、や

Meanings: roof, house, shop, dealer, seller

Readings: コン、ね、 -ね

Meanings: root, radical, head (pimple)

Readings: スイ、ふ.く

Meanings: blow, breathe, puff, emit, smoke