Wiktionary
uncivilly
adv. (context obsolete English) In an uncivil manner; not courteously; rudely.
WordNet
uncivilly
adv. in an uncivil manner; "he treats his former wife uncivilly" [ant: civilly]
Usage examples of "uncivilly".
But it so happens that he had disowned Papa years and years before, and he wrote very uncivilly to Miss Fletching, saying that he wanted to know nothing about his ramshackle son’s brats, and recommending her to apply to my mama’s relations.