耳栓

1. Origins, structure, and basic meaning

• Structure: In 耳栓 (みみせん), ear 耳 and plug 栓 combine to denote earplugs.
• Basic usage: 耳栓 is an object inserted in the ears to block sound or water.

2. Common pitfalls and similar expressions

• Earplug versus covering the ears
  • It differs from the act of covering one's ears with the hands, and predicates after 耳栓を include inserting, removing, or preparing it.