Where does “Luftpostbriefkasten” come from?

Luftpostbriefkasten (German) comes from German Luftpost, from German Post, from English post, from Middle French poste, from Italian posta, from Latin probāre, from Latin probō, from Latin Probus — passed , crossed.

Luftpostbriefkasten (German): airmail mailbox

Definitions

  1. airmail mailbox

Ancestry of “Luftpostbriefkasten”, step by step

Luftpostbriefkasten traces back through two separate lines of ancestry.

via German Luftpost

StepLanguageWordMeaning
1GermanLuftpostairmail postal system
2GermanPostpost; post office; Obsolete form of Porst
3EnglishpostA long dowel or plank protruding from the ground;...
4Middle Frenchposte
5Italianpostamail, post; post office; stakes
6Latinprobāre
7Latinprobōto approve, permit, commend
8LatinProbusgood, serviceable, excellent, superior, able
9Proto-Indo-Europeanpro-bhwo-being in front, prominent
10Proto-Indo-Europeanpro-toward, forward
11Proto-Indo-Europeanpor-to give birth; forward, through; going, passage
12Proto-Indo-Europeanper-before, in front; first; to go through
13Proto-Indo-Europeanpr̥tóspassed , crossed

via German Briefkasten

StepLanguageWordMeaning
1GermanBriefkastenmailbox, letterbox
2Germanbriefletter (written message)
3Middle High Germanbrief
4Old High Germanbriaf
5Latinbrevenominative neuter singular of brevis; accusative...
6Latinbrevisshort, small, little, narrow; brief, short;...
7Proto-Italic*breɣʷis
8Proto-Indo-Europeanmréǵʰusshort; brief
9Proto-Indo-Europeanmreǵʰ-short
Every word from Proto-Indo-European pr̥tós