むくち無口mukuchi
1.

A person who tends to speak very little, often only communicating when necessary, leading to a perception of being reserved or introverted.

2.

The quality of being reserved in speech, characterized by a deliberate choice to avoid unnecessary conversation and express thoughts with few words.

3.

A disposition marked by a preference for silence, where an individual refrains from speaking freely or frequently, often resulting in a calm, composed presence in social situations.

4.

The state of being uncommunicative or quiet, with an inclination to listen rather than engage in dialogue, making one appear thoughtful or contemplative.

Example:

大きくて、のろくて、無口でした。

むこう無口mukou
1.

Characterized by a tendency to speak very little, often reserving words for necessary communication only.

2.

Describing someone who is taciturn or reticent, often resulting in a quiet demeanor that may lead others to perceive them as distant or introspective.

3.

Pertaining to a person who maintains silence or minimal speech in social situations, suggesting an inclination towards listening rather than engaging in conversation.

4.

Indicating a communication style where one prefers brevity, leading to a perception of being reserved or shy rather than outspoken.