knob

a round or square piece of metal, plastic, etc. that you turn to open a door or window

pomo, manilla

• knob on the door

Collocations turn the knob · door knob

• He turned the knob and opened the door.

  Él giró el pomo y abrió la puerta.

a round piece of metal, plastic, etc. that you turn to control a machine or device

muelle, perilla

• knob on the radio

Collocations turn up/down the knob · volume knob

• She turned down the volume knob.

  Ella bajó el muelle del volumen.

(informal) a person, especially one who is not liked or respected

tipo, persona (despectivo)

• knob of somebody

• He's just a knob.

  Él es solo un tipo desagradable.