cotter verb² trans. ['kɒtǝ] M17.
[from COTTER noun¹.]
Fasten (esp. a window-shutter) with a cotter.

[TahlilGaran] English Dictionary ▲

cotter noun¹. ['kɒtǝ] ME.
[Origin unkn.: see COTTEREL.]
In machinery etc.: a pin, wedge, or bolt which passes into a hole and holds two parts together.

Comb.:
cotter-pin (a) a cotter of circular cross-section; (b) a split pin for keeping a cotter in place.

[TahlilGaran] English Dictionary ▲

cotter verb¹. ['kɒtǝ] Chiefly dial. L16.
[Origin unkn.: cf. COTTED adjective¹.]
1. verb trans. Cause to thicken or coagulate; esp. scramble (an egg). L16.

2. verb trans. & intrans. Form into a tangled mass; entangle, mat. L18.

3. verb intrans. Shrivel or shrink up. E19.

[TahlilGaran] English Dictionary ▲