[calk] , calk.er var of caulk, caulker
[2]calk n [prob. alter. of calkin, fr. ME kakun, fr. MD or ONF; MD calcoen horse's hoof, fr. ONF calcain heel, fr. L calcaneum, fr. calc-, calx heel] (1587): a tapered piece projecting downward on the shoe of a horse to prevent slipping; also: a similar device worn on the sole of a shoe [3]calk vt (1624) 1: to furnish with calks
2: to wound with a calk