helmet

helmet — noun

1. a hard, durable covering worn on the head to lower the chance of injury during a

1.名詞B1
釋義

a hard, durable covering worn on the head to lower the chance of injury during activities such as cycling, construction work, or contact sports

例句

Bao always wears his helmet when he rides his bicycle to school.

collocation: wear a helmet

The building boss checked that every worker wore a hard helmet on site.

collocation: hard helmet (material type)

同義詞
  • hard hat

    limited to construction and industrial use; not worn for cycling or sports

  • crash helmet

    specifically for high-speed protection such as motorcycle racing or car racing

  • headgear

    much broader term that includes hats, caps, and hair accessories — not limited to protective gear

用法筆記

The most common verbs with this sense are 'wear', 'put on', and 'take off'. A helmet can be described by its purpose (cycling helmet, safety helmet) or material (hard helmet, carbon-fibre helmet). In many places, wearing a helmet is required by law for motorcyclists and cyclists.

常見錯誤

❌I forgot my safety hat at home.' (when you mean a bicycle helmet)
✅I forgot my helmet at home.
💡'Hard hat' or 'safety hat' is specific to construction; for cycling or sports, use 'helmet'.
❌He helmet his head before riding the bike.
✅He put on his helmet before riding the bike.
💡'Helmet' is a noun only; it is not used as a verb in standard English.

2. a metal head covering worn as part of a soldier's armour, especially in ancient

2.名詞B2
釋義

a metal head covering worn as part of a soldier's armour, especially in ancient or medieval times, designed to protect against swords, arrows, and other weapons

例句

The knight's heavy metal helmet covered his entire face except for a narrow slit.

collocation: metal helmet

In the history museum, Anjali saw a bronze helmet worn by soldiers in ancient Greece.

同義詞
  • headpiece

    a more general term for any head covering in armour, not necessarily made of metal

  • visor

    refers only to the movable front part of a helmet that protects the face, not the whole helmet

用法筆記

This sense appears mainly in historical, fantasy, or museum contexts. Unlike the modern safety-helmet sense, these helmets are usually made of metal and described by period or culture (Roman, samurai, Viking) or by design features (visor, crest, visor slit).

常見錯誤

❌The soldier wore a metal helmet to keep his head dry in the rain.
✅The soldier wore a metal helmet to protect his head from swords and arrows.
💡This sense is about combat protection against weapons, not weather.