Wiktionary
unmelodiously
adv. In an unmelodious manner.
WordNet
unmelodiously
adv. in an unmelodious manner; "she sings rather unmelodiously" [ant: melodiously]
Usage examples of "unmelodiously".
Bland employed at this point has recently become quite the vogue in the best circles of society, although for years it has been unmelodiously shouted through the streets by the commoner run of man.
They came marching along, singing “The Thiefs Revenge” as loudly and unmelodiously as twenty men could do, while behind them came such of the noncombatants as wanted to flourish a shovel or pick and learn to march in step.
Fancot, urgently shaken, opened his eyes, smiled upon the company, and began to hum softly and unmelodiously to himself.