螺丝 luósī screw
How to remember 螺丝: 螺 spiral shell + 丝 silk = screw.
Characters
How it is used
- A screw - 拧螺丝 (nǐng luósī) tighten/turn a screw; 螺丝刀 (luósīdāo) screwdriver.
- Everyday hardware word; also 螺丝钉 (luósīdīng), used figuratively for a small but essential cog in a machine/system.
- 丝 refers to the spiral thread.