Wiktionary
a. Not tuneful; unmusical, inharmonious.
WordNet
adj. not having a musical sound or pleasing tune [syn: tuneless, unmelodious] [ant: tuneful]
Usage examples of "untuneful".
When, wandering round my life unleaved, I The bloodied feathers scattered in the brake, And think how she, far from me, with like eyes Sees through the untuneful bough the wingless skies?
He took a last look at the shaded green garden and left, whistling in an off key an untuneful air from a roofless farce comedy.
All who have consciously practised the art of writing know what endless and painful vigilance is needed for the avoidance of the unfit or untuneful phrase, how the meaning must be tossed from expression to expression, mutilated and deceived, ere it can find rest in words.