blinker

nouns

a light that flashes on and off; used as a signal or to send messages
blinker, flasher
is derived from
blink
a blinking light on a motor vehicle that indicates the direction in which the vehicle is about to turn
blinker, trafficator, turn indicator, turn signal
is derived from
blink
blind consisting of a leather eyepatch sewn to the side of the halter that prevents a horse from seeing something on either side
blinder, blinker, winker

verbs

put blinders on (a horse)
blinker
is a type of (narrower)
provide with a covering or cause to be covered
"cover her face with a handkerchief"; "cover the child with a blanket"; "cover the grave with flowers"
cover