Emily Dickinson Lexicon

CUM'BROUS, a.

1. Burdensome; troublesome; rendering action difficult or toilsome; oppressive; as, a cumbrous weight or charge. Milton. Dryden.
2. Giving trouble; vexatious; as, a cloud of cumbrous gnats. – Spenser.
3. Confused; jumbled; obstructing each other; as, the cumbrous elements. – Milton.