Where does “go postal” come from?

go postal (English) comes from English postal, from English post, from Middle French poste, from Italian posta, from Latin probāre, from Latin probō, from Latin Probus, from Proto-Indo-European pro-bhwo- — passed , crossed.

go postal (English): To become erratic and aggressive, often by...

Definitions

  1. To become erratic and aggressive, often by...

Ancestry of “go postal”, step by step

go postal traces back through two separate lines of ancestry.

via English postal

StepLanguageWordMeaning
1EnglishpostalRelating to the collection, sorting and delivery...
2EnglishpostA long dowel or plank protruding from the ground;...
3Middle Frenchposte
4Italianpostamail, post; post office; stakes
5Latinprobāre
6Latinprobōto approve, permit, commend
7LatinProbusgood, serviceable, excellent, superior, able
8Proto-Indo-Europeanpro-bhwo-being in front, prominent
9Proto-Indo-Europeanpro-toward, forward
10Proto-Indo-Europeanpor-to give birth; forward, through; going, passage
11Proto-Indo-Europeanper-before, in front; first; to go through
12Proto-Indo-Europeanpr̥tóspassed , crossed

via English go

StepLanguageWordMeaning
1EnglishgoTo move, either physically or in an abstract sense
2Middle EnglishgoonAlternative form of gon
3Middle Englishgonto go; past participle of gon; Alternative form...
4Old Englishgānto go
5Proto-West Germanicgānto go
6Proto-Germanicgānąto go, walk
7Proto-Indo-Europeanǵʰengʰ-to walk; to step
Every word from Proto-Indo-European pr̥tósEvery word from Proto-Indo-European per-Every word from Proto-Indo-European por-