The compressed clay of coal strata.
A thick group or bunch, especially of bushes or hair.
A small group of trees or plants.
A cluster or lump; an unshaped piece or mass.
A dull thud.
A thick addition to the sole of a shoe.
To gather in dense groups.
To form clusters or lumps.
To walk with heavy footfalls.
To strike; to beat.
A thick semisolid
A clot (of blood)