CUMBROUSLY
Etymology
Adverb
cumbrously (comparative more cumbrously, superlative most cumbrously)
In a cumbrous manner.
Source: Wiktionary
CUMBROUS
Cum"brous (km"brs), a.
1. Rendering action or motion difficult or toilsome; serving to
obstruct or hinder; burdensome; clogging.
He sunk beneath the cumbrous weight. Swift.
That cumbrousand unwieldy style which disfigures English composition
so extensively. De Quincey.
2. Giving trouble; vexatious. [Obs.]
A clud of cumbrous gnats. Spenser.
– Cum"brous*ly, adv.
– Cum"brous*ness, n.
Source: Webster’s Unabridged Dictionary 1913 Edition