Diction
Diction , noun
[Latin dicto a saying, a word, from dicere, dictum, to say; akin to dicare to proclaim, and to English teach, token: compare French diction. See Teach, and compare Benison, Dedicate, Index, Judge, Preach, Vengeance.]
Choice of words for the expression of ideas; the construction, disposition, and application of words in discourse, with regard to clearness, accuracy, variety, etc.; mode of expression; language; as, the diction of Chaucer's poems.
His diction blazes up into a sudden explosion of prophetic grandeur.