(kôk) v.t.
1. Naut. To make tight, as a boat's seams, by plugging with soft material, as oakum or hemp fiber.
2. To hammer or fasten together, as the edges of the plates of a boiler.
3. To plug up the crevices of, as a window frame. Also spelled caulk. [<OF cauquer <L calcare tread]
—calk′ing noun

(kôk) noun
1. A spur on a horse's shoe to prevent slipping.
2. A plate with sharp points worn on the sole of a person's boot or shoe to prevent slipping. Also calk′er, calk′in.
—v.t.
1. furnish with calks.
2. To wound with a calk. [Prob. <L calx heel]