枕カバー

1. Origins, structure, and basic meaning

• Structure: 枕カバー(まくらかばー) means a pillowcase, combining 枕 with the loanword カバー.
• Basic usage: It appears when washing and drying a pillowcase or switching to a material suited to the season.

2. Common pitfalls and similar expressions

• Difference from シーツ
  • 枕カバー covers a pillow, while シーツ is a sheet spread over a mattress or futon.