Where does “Drehspiegel” come from?

Drehspiegel (German) comes from German spiegel, from Middle High German spiegel, from Old Saxon spiagal, from Proto-Germanic *spēgl, from Medieval Latin speglum, from Latin speculum, from Proto-Italic -klom, from Proto-Indo-European -tlom — Derives agent nouns from verbs, denoting someone...

Drehspiegel (German): cheval glass

Definitions

  1. cheval glass

Ancestry of “Drehspiegel”, step by step

Drehspiegel traces back through two separate lines of ancestry.

via German spiegel

StepLanguageWordMeaning
1Germanspiegelinflection of spiegeln: ## first-person singular...
2Middle High Germanspiegelmirror
3Old Saxonspiagal
4Proto-Germanic*spēgl
5Medieval Latinspeglum
6Latinspeculuma looking-glass, mirror
7Proto-Italic-klom
8Proto-Indo-European-tlomAlternative form of *-trom
9Proto-Indo-European-tromForms nouns denoting a tool or instrument
10Proto-Indo-European-tḗrDerives agent nouns from verbs, denoting someone...

via German drehen

StepLanguageWordMeaning
1Germandrehento turn, revolve, rotate, roll; to shoot; to veer
2Middle High Germandræjen
3Old High Germandrāento turn; to twist; turn
4Proto-West Germanicþrāanto twist
5Proto-Germanicþrēanąto twist, to turn
6Proto-Indo-Europeanterh₁-to rub, turn; to drill, pierce
Every word from Proto-Indo-European -tḗrEvery word from Proto-Italic -klomEvery word from Latin speculum