bole

nouns

a soft oily clay used as a pigment (especially a reddish brown pigment)
bole
is a type of (narrower)
the part of the earth's surface consisting of humus and disintegrated rock
dirt, soil
is a type of (narrower)
dry coloring material (especially a powder to be mixed with a liquid to produce paint, etc.)
pigment
the main stem of a tree; usually covered with bark; the bole is usually the part that is commercially useful for lumber
bole, tree trunk, trunk