You searched for: “tar
tar, tar
tar (TAHR) (noun)
A very thick, black, sticky liquid made from coal that becomes hard when it cools and which is used especially for road and street surfaces: "During the winter, the roads have many holes which will need to be repaired with tar and its components for use on highways."
tar (TAHR) (verb)
To cover something with a thick covering: "We will be so very glad when the city will tar the roads again because it is very difficult to drive on them now."

When they tar the city streets again, the people hope the new tar will make driving much smoother.