blinker

ot noun

1. Anything that blinks, such as the turn signal of an automobile.
2. Eye shields attached to a hood for horses, to prevent them from seeing backwards and partially sideways.
3. Whatever obstructs sight or discernment.
4. The eyelid.

fe’l verb

1. To put blinkers on. The farmer stopped to blinker his horse before riding into an area of heavy traffic.