Brush — a tool with bristles used for brushing hair, clothes, shoes, painting, etc. (loanword from English).
朝、ヘアブラシで髪を整えた。
In the morning I tidied my hair with a hair brush.
古いコートの毛玉をブラシで取った。
I removed the lint from the old coat with a brush.
絵を描くときは用途に応じて硬さの違うブラシを使う。
When painting, you use brushes of different stiffness depending on the purpose.