Marker

I use a red marker to color the heart on the paper.

She accidentally left the marker uncapped and it dried out.

The artist used a black marker to create the outlines of the drawing.

The teacher drew a smiley face on the board with a black marker.

He used a purple marker to write his name on the label.

She used a green marker to circle the correct answer on the test.

He accidentally left the marker uncapped, causing it to dry out.

He drew a picture of a flower using a green marker.

The marker on the street indicates where the gas line is buried.

The white marker on the board shows the score of the basketball game.

The red marker on the calendar shows the date of the meeting.

The toll booth operator is a marker of the cost of using the highway.

The night watchman is a marker who guards a building during non-business hours.