梳 can be both a verb ('to comb') and a noun ('a comb'). As a noun, it's often used in the compound 梳子 (shūzi). The verb is most commonly used in 梳头 (to comb one's hair).
memory
The radical 木 (wood) on the left hints that combs were traditionally made of wood.
The tree-wood radical on the left tells us 梳 is a wooden implement — combs were traditionally carved from boxwood, sandalwood, or bamboo. It indexes 梳 with the wooden-object family: 桌 table, 椅 chair, 板 board, 林 forest, 床 bed.
phonetic
㐬liú
flowing (here phonetic)
The right side is 㐬, the phonetic core also in 流 (flow) and 疏 (sparse). It supplies the sound — liú/shū are linked through the same series — and adds a soft semantic note: a comb makes hair flow smoothly. Same group: 流 flow, 硫 sulphur, 琉 lapis.