水泳帽

1. Origins, structure, and basic meaning

• Structure: 水泳帽 is read as すいえいぼう and is a noun combining 水泳 (swimming) and 帽 (cap), meaning a cap worn while swimming.
• Basic usage: Use 水泳帽をかぶる for wearing it and 水泳帽に名前を書く when the cap is the surface written on.

2. Common pitfalls and similar expressions

• Verb used for wearing it
  • Because it is headwear, the verb is かぶる, not 着る.
• を and に
  • を marks the item being put on, while に marks the surface or destination of the writing.