剪刀 (jiǎn dāo) is a compound noun meaning 'scissors' — a hand-held tool with two pivoted blades used for cutting paper, fabric, hair, and other thin materials. The first character 剪 (jiǎn) means 'to cut' or 'to trim', and the second character 刀 (dāo) means 'knife' or 'blade'; together, they literally convey 'cutting blade(s)', reflecting the tool’s function and form. Unlike English, which treats 'scissors' as plural in form but singular or plural in usage, 剪刀 is grammatically singular in Chinese and does not change form for number.

This word is commonly used in daily life — in classrooms, tailoring, arts and crafts, barbershops, and offices. It appears frequently in instructions ('Please pass me the scissors'), safety warnings ('Keep scissors away from children'), and descriptive contexts ('a pair of sharp scissors'). While often used bare, it may be modified by measure words like 把 (bǎ) — e.g., 一把剪刀 — especially when specifying quantity or possession.