Where does “dermascope” come from?

dermascope (English) comes from English derma, from Yiddish דערמע, from Yiddish דאַרם, from Middle High German darm, from Old High German darm, from Proto-West Germanic þarm, from Proto-Germanic þarmaz, from Proto-Indo-European tórmos — to rub, turn; to drill, pierce.

Ancestry of “dermascope”, step by step

dermascope traces back through two separate lines of ancestry.

via English derma

StepLanguageWordMeaning
1Englishdermathe inner layer of the skin; the dermis; a Jewish...
2Yiddishדערמע
3Yiddishדאַרםintestine
4Middle High Germandarm
5Old High Germandarm
6Proto-West Germanicþarmintestine
7Proto-Germanicþarmazintestine
8Proto-Indo-Europeantórmosborehole
9Proto-Indo-Europeanterh₁-to rub, turn; to drill, pierce

via English scope

StepLanguageWordMeaning
1EnglishscopeThe breadth, depth or reach of a subject; a...
2Italianscopoaim, end, goal; first-person singular present...
3Latinscopusa target
4Ancient Greekσκοπόςwatcher, lookout; protector, guardian; spy, scout
5Ancient GreekσκέπτομαιI look at, examine; I examine, consider, think
6Proto-Hellenicsképťomaito look at
7Proto-Indo-Europeanspéḱyetito be looking at, to keep looking at
8Proto-Indo-Europeanspeḱ-to see, to look, to observe
Every word from Proto-Indo-European terh₁-Every word from Proto-Indo-European tórmosEvery word from Proto-Germanic þarmaz