Where does “Kontroll-Leuchte” come from?

Kontroll-Leuchte (German) comes from German Kontrolle, from French contrôle, from Old French contrerole, from Medieval Latin contrarotulum, from Medieval Latin rotulus, from Latin rotula, from Arabic رَطْل, from Classical Syriac ܪܝܛܠܐ — ingot.

Ancestry of “Kontroll-Leuchte”, step by step

Kontroll-Leuchte traces back through two separate lines of ancestry.

via German Kontrolle

StepLanguageWordMeaning
1GermanKontrolleinspection; control
2Frenchcontrôlecontrol; test; first-person singular present...
3Old Frenchcontrerole
4Medieval Latincontrarotuluma counter-roll or register used to verify...
5Medieval Latinrotulusa roll, list, catalogue, schedule, record, a...
6Latinrotulaa small wheel; roll
7Arabicرَطْل
8Classical Syriacܪܝܛܠܐ
9Classical Syriacܠܝܛܪܐlibra, pound
10Frenchlitrelitre
11Medieval Latinlitra
12Ancient Greekλίτραlitra, a Sicilian silver coin; libra, a unit of...
13Proto-Italic*līðrāingot

via German Leuchte

StepLanguageWordMeaning
1GermanLeuchtelamp, light; beacon
2Middle High Germanliuhte
3Old High Germanliuhta
Every word from Proto-Italic *līðrāEvery word from Ancient Greek λίτραEvery word from Medieval Latin litra