"Crock" is a word in ENGLISH

The loose black particles collected from combustion, as on
pots and kettles, or in a chimney; soot; smut; also, coloring matter
which rubs off from cloth.

To lay up in a crock; as, to crock butter.

To soil by contact, as with soot, or with the coloring
matter of badly dyed cloth.

Any piece of crockery, especially of coarse earthenware; an
earthen pot or pitcher.

To give off crock or smut.

A low stool.