utterless

a. utter的变形

释义与例句

adj.
  1. 1.

    Incapable of being uttered.

    古体 文学

    1820, John Keats, Hyperion, Book 2, in Lamia, Isabella, The Eve of St. Agnes, and Other Poems, London: Taylor and Hessey, pp. 173-174, […] there is a noise Among immortals when a God gives sign, With hushing finger, how he means to load His tongue with the full weight of utterless thought, With thunder, and with music, and with pomp:

词源

From utter + -less.

来源：wiktionary