口くち重おも

na-adjective, noun

slow of speech; reticent; taciturn

Describes a person who is not talkative, speaks slowly, or is hesitant to speak. The gloss 'prudent' likely refers to a cautious, reserved manner rather than wisdom. Often used with 人 or 性格.

• 彼かれは口くち重おもな人ひとで、あまり話はなさない。

  He is a taciturn person and doesn't talk much.

• 口くち重おもな性せい格かくだから、初しょ対たい面めんの人ひととはなかなか打うち解とけられない。

  Because of my reticent nature, I find it hard to open up to people I've just met.