taciturnEnglishOxford Dictionary of Englishtaciturn /ˈtasɪtəːn / ▸ adjective (of a person) reserved or uncommunicative in speech; saying little: after such gatherings she would be taciturn and morose. – DERIVATIVES taciturnity /ˌtasɪˈtəːnɪti / noun taciturnly /ˈtasɪtəːnli / adverb– ORIGIN late 18th century: from Latin taciturnus, from tacitus (see tacit).