'Uncouthly' definitions:

Definition of 'uncouthly'

adverb

In an uncouth manner; "uncouthly, he told stories that made everybody at the table wince"

From: GCIDE

Uncouth \Un*couth"\ ([u^]n*k[=oo]th"), a. [OE. uncouth, AS. unc[=u][eth] unknown, strange: un- (see Un- not) + c[=u][eth] known, p. p. of cunnan to know. See Can to be able, and cf. Unco, Unked.]
1. Unknown. [Obs.] "This uncouth errand." --Milton. [1913 Webster]
To leave the good that I had in hand, In hope of better that was uncouth. --Spenser. [1913 Webster]
2. Uncommon; rare; exquisite; elegant. [Obs.] [1913 Webster]
Harness . . . so uncouth and so rich. --Chaucer. [1913 Webster]
3. Unfamiliar; strange; hence, mysterious; dreadful; also, odd; awkward; boorish; as, uncouth manners. "Uncouth in guise and gesture." --I. Taylor. [1913 Webster]
I am surprised with an uncouth fear. --Shak. [1913 Webster]
Thus sang the uncouth swain. --Milton. [1913 Webster]
Syn: See Awkward. [1913 Webster] -- {Un*couth"ly}, adv. -- {Un*couth"ness}, n. [1913 Webster]