blinken

In a sentence

• Die Ampel blinkt gelb.

  The traffic light is blinking yellow.

  Here, the word 'blinken' is used to describe the action of the traffic light emitting intermittent yellow light as a signal.

• Du musst blinken, bevor du abbiegen kannst.

  You need to signal before you can turn.

  In this context, 'blinken' refers to the act of activating the indicator lights of a vehicle to show the turning intention.

• Der Stern blinkte am Himmel wie eine Nachricht.

  The star blinked in the sky like a message.

  Here, 'blinken' is used to metaphorically describe the star emitting fluctuating light in the night sky, resembling a communicative signal.