Sound made by an electric vehicle at low speed Crossword Clue

 The answer to the crossword clue "sound made by an electric vehicle at low speed" is HUM. Electric vehicles do not have engines, so they do not make the same loud noise as gasoline-powered vehicles. At low speeds, electric vehicles may make a faint humming sound. This is caused by the movement of the electric motors and the tires.

Here are some other words that can be used in a crossword puzzle clue for "sound made by an electric vehicle at low speed":

Whirr

Buzz

Drone

Murmur

Low hum

Gentle hum

Quiet hum

Barely audible hum

I hope this helps!