What word describes a person who is habitually silent or quiet, inclined to talk very little?

The word "taciturn" specifically refers to a person who tends to be habitually silent or quiet and is inclined to speak very little. This term emphasizes a disposition toward reticence and a lack of verbal communication, highlighting an individual's tendency to be reserved in conversation. Such a characteristic often indicates a personality that is more reflective or thoughtful, as opposed to being outgoing or expressive.

In contrast, the other options describe people who are more inclined to engage in conversation. "Talkative," "vocal," and "loquacious" all refer to individuals who communicate frequently and at great length. These words convey the opposite tendency, indicating a preference for speaking rather than maintaining silence or quietness. Thus, "taciturn" stands out as the correct term for someone who is habitually quiet.