Helmet (noun)

A protective covering for the head, worn in activities such as cycling, construction, or combat.

Origin:

Late middle english: from old french helmet, from medieval latin helmetum, of germanic origin.

Examples:

1. The soldier wore a helmet in combat.
2. The construction worker wears a helmet for safety.
3. The cyclist wears a helmet for protection.
4. The motorcyclist wears a helmet for safety.
5. The skater wears a helmet for protection.