Webster's Revised Unabridged Dictionary · 1913

Frap

Frap , transitive verb

[Compare French frapper to strike, to seize ropes. Compare Affrap.]

1.
(Nautical) To draw together; to bind with a view to secure and strengthen, as a vessel by passing cables around it; to tighten; as a tackle by drawing the lines together. — Tottem
2.
To brace by drawing together, as the cords of a drum. — Knoght