0 having no tune and unpleasant:
tuneless whistling
He bathed and tried to keep up his spirits by singing in his tuneless way, but it didn't help.
Instead of which the insulted individual went into his corner again, and re-commenced playing his tuneless piano in the meekest possible manner.
But the monotonous, tuneless sound seemed to go round, and round, and round inside her head.
We loved her noble, musical tone, and yet we always enjoyed our father's tuneless roar.
Never had a more tuneless voice been heard or one managed with less art.
They have chanted a depressing psalm or two to the most tuneless of ancient ditties.
It was a dismal service, with its dreary sermon and its tuneless hymns.
Exactly thus had he often listened to it swishing through the crannies of high rocks, tuneless yet searching.