DictionarytarSticky black substance
noun / verb

tar

TAR/tɑːr/

A thick black coating substance.

The open metal pail holds thick, sticky black tar.

Close-up of an open utilitarian metal pail filled with thick black tar.
Etymology

Old English teoru referred to tar, pitch, and resin—the sticky material associated with certain trees. This connects the modern substance with its longstanding uses in sealing and caulking.

In context

Stay-At-Home! Literary Festival17:11
as if he had been poured in tar he lies on a pillow of turf and seems to weep the black river of himself
Elizabeth Reeder, 'The Pleasures of Detail'

More examples

  • Workers tar the wooden posts to protect them from moisture.
  • A smear of tar sticks to my boot.
  • The freshly tarred roof keeps the rain out.

Forms

tar · tars · tarred · tarring

tarry adjective — Thick, dark, and sticky like tar.

Similar words

pitch
Usually a thicker, more solid substance used for waterproofing.
bitumen
Specifically a petroleum substance commonly used in paving and roofing.