CAULK

I. transitive verb or calk Etymology: Middle English ~en, from Anglo-French cauker, calcher, chalcher to trample, from Latin calcare, from calc-, calx heel Date: 15th century to stop up and make tight against leakage (as a boat or its seams, the cracks in a window frame, or the joints of a pipe), ~er noun II. noun or calk; also ~ing or calking Date: 1954 material used to ~, see: calk