Wiktionary
tunelessly
adv. In a tuneless manner.
WordNet
tunelessly
adv. in a tuneless fashion; "he whistled tunelessly"
Usage examples of "tunelessly".
The man was whistling tunelessly to himself, gesturing for her to hurry.
The man, whistling tunelessly, had begun to clean the white sports car.
A clink of boot nails on the ridge stone warned him and, whistling tunelessly, he picked up the beast's feet in turn, checking for stones in the cleft hooves.
Arthur, who was stropping a razor and whistling tunelessly, raised his eyebrows.