der Regler
Translation
controller, regulator, dial, knob
Examples
Dreh den Regler für die Lautstärke nach rechts.
Turn the volume knob to the right.
Der Regler steuert die Temperatur.
The controller regulates the temperature.
Grammar Patterns
to turn/adjust ((sth.)) to turn/adjust ((the knob)) Dreh den Regler nach rechts.
Similar Words
der Schalter (switch), der Knopf (button), die Steuerung (control unit)
Etymology
From the verb 'regeln' (to regulate, control) + the suffix '-er' (denoting a person or thing that performs an action).
Memory Tips
A 'Regler' is something that helps you 'regeln' (regulate) something, like temperature or volume.