火災報知器が鳴った。

火災報知器が鳴った。

The fire alarm sounded.

火災報知器(かさいほうちき)が鳴(な)った。

Kasaihōchiki ga natta.

火災報知器 (かさいほうちき)

fire alarm (box)

が (が)

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

鳴る (なる)

to sound; to ring; to resound; to echo; to roar; to rumble

Readings: カ、ひ、 -び、ほ-

Meaning: fire

Readings: サイ、わざわ.い

Meanings: disaster, calamity, woe, curse, evil

Readings: ホウ、むく.いる

Meanings: report, news, reward, retribution

Readings: チ、し.る、し.らせる

Meanings: know, wisdom

Readings: キ、うつわ

Meanings: utensil, vessel, receptacle, implement, instrument, ability, container, tool, set

Readings: メイ、な.く、な.る、な.らす

Meanings: chirp, cry, bark, sound, ring, echo, honk