helmet
/ˈhɛlmət/noun
A strong covering worn on the head for protection, historically part of a soldier's armor.
Example sentences
- “Always wear a helmet when you ride your bike.”
- “Football players wear padded helmets to protect against head injuries.”
The standard verb is 'wear', and safety writing uses 'helmet laws' and 'helmet use'. Bike, motorcycle, football, and combat helmets are all just 'helmets'; English does not subdivide the word.