calk

transitive verb

noun

1. a part of a horseshoe that projects downward to prevent slipping
2. ☆ a metal plate with spurs, fastened to the sole of a shoe to prevent slipping

Etymology: < ? L calcar, spur: see calcar

transitive verb

1. to fasten calks on
2. to cut (its leg) accidentally with a calk: said of a horse