Ineloquent adj. Not eloquent; not fluent, graceful, or moving; not persuasive; as, ineloquent language. "Nor are thy lips ungraceful, sire of men, Nor tongue ineloquent."
... school, when the intervention of two beings whom I had thought utterly remote from me, gave me a new philosophy and reconciled me to life. The first was a master, who found me grieving in one of my oubliettes and took me into his study and tried to draw me out. Kindness always made me ineloquent, and as I sat in his big basket chair and sniffed the delightful odour of his pipe, I expressed myself chiefly in woe-begone monosyllables and hiccoughs. Nevertheless he seemed to understand me very well, ... — The Ghost Ship • Richard Middleton