無口

1. Origins, structure, and basic meaning

• Structure: 無口 is read as むくち and is a noun and na-adjective describing a person as quiet or reticent because they speak very little.
• Basic usage: A quiet artisan appears in 無口な職人, while being reticent at home appears in 家では無口だ.

2. Common pitfalls and similar expressions

• Few words rather than low volume
  • It does not mean that the voice is soft; it means that the person says relatively little in conversation.
• Difference from 静か
  • Unlike the broad adjective for a quiet person or place, this term specifically concerns how little someone speaks.