windbreak; protection against wind
General term for a physical barrier or shield that blocks wind, such as a windshield, wind fence, or protective cover.
At camp, a windbreak protects the campfire.
I replaced the motorcycle's windshield.
watch crystal; glass or plastic cover over a watch face
Specifically the transparent cover over a watch dial. Common in watch-related contexts.
The watch crystal got scratched.
windshield; windscreen
Compound of 風 (wind) and 防 (defense, protection). The meaning 'watch crystal' is a specialized extension of the wind-protection sense.