Where does “fire alarm” come from?

fire alarm (English) comes from English alarm, from Middle English alarme, from Middle French alarme, from Italian all'arme, from Latin arma, from Late Latin armistitium, from Latin sistere, from Proto-Indo-European stísteh₂ti — to stand.

fire alarm (English): An electromechanical or electronic bell, klaxon,...

Definitions

  1. An electromechanical or electronic bell, klaxon,...

Ancestry of “fire alarm”, step by step

fire alarm traces back through two separate lines of ancestry.

via English alarm

StepLanguageWordMeaning
1EnglishalarmA summons to arms, as on the approach of an...
2Middle Englishalarme
3Middle Frenchalarme
4Italianall'armea command to take up arms and be ready to fight: to arms!
5Latinarmadefensive arms, armor/armour, shields, weapons of...
6Late Latinarmistitium
7Latinsisteresecond-person singular future passive indicative...
8Proto-Indo-Europeanstísteh₂tito be standing up, to be getting up
9Proto-Indo-Europeansteh₂-to stand

via English fire

StepLanguageWordMeaning
1EnglishfireA chemical reaction involving the bonding of...
2Middle EnglishfierAlternative form of figer
3Old Englishfȳrfire
4Old EnglishfeorAlternative form of feorr; far
5Proto-Germanicferraifar, distant
6Proto-Indo-Europeanper-nóy
7Proto-Indo-Europeanper-before, in front; first; to go through
8Proto-Indo-Europeanpr̥tóspassed , crossed
Every word from Proto-Indo-European steh₂-Every word from Proto-Indo-European stísteh₂tiEvery word from Latin sistere
fire alarm — Etymology, Origin & Word History | Etymology Explorer