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DictionarypitchSticky substance
noun

pitch

A dark sticky substance used for sealing surfaces.

The boat builder seals the wooden seams with warm pitch.

Etymology
pitchOld Englishpitch

The Old English noun already named the dark resinous material. This sealing substance has a separate history from the verb meaning to throw.

More examples

  • A layer of pitch keeps water from leaking through the roof.
  • Sticky pitch clings to the worker's gloves.
  • The pitch hardens as it cools.

Similar words

tar
Usually more fluid than pitch, which can be made from it.
resin
Often lighter in color and not necessarily used for sealing.