Cūm'ber-sōme, a.
a. 1. Burdensome or hindering, as a weight or drag; oppressive; embarrassing; vexatious; cumbrous. “To perform a cumbersome obedience.” Sidney.
Sense 2. Not easily managed or administered; as, a cumbersome contrivance or machine.
He holds them in utter contempt, as lumbering, cumbersome, circuitous. I. Taylor.