A brush is a common tool with bristles, wire or other filaments. It generally consists of a handle or block to which filaments are affixed in either a parallel or perpendicular orientation, depending on the way the brush is to be gripped during use.

an object with short pieces of stiff hair, plastic, or wire attached to a base or handle, used for cleaning, arranging your hair, or painting: I can't find my brush, but I still have my comb.

noun (2) 1 : a device composed of bristles typically set into a handle and used especially for sweeping, smoothing, scrubbing, or painting 2 : something resembling a brush: such as a : a bushy tail