Cumbrous

Possession's load was grown so great, / He sunk beneath the cumbrous weight: […]

Source: wiktionary

He therefore came to a ſudden reolution of throvving off thoſe cumbrous ornaments of learning, vvhich, as he imagined, hindered his reception; and vvith no other images than arcs and angles, commenced a man of vvit and jocularity.

Source: wiktionary

The rest of the furniture is in a suitable style, particularly an arm-chair of cumbrous workmanship, constructed of wood, curiously turned, with a high back and triangular seat, said to have been used by Judge Popham in the reign of Elizabeth.

Source: wiktionary

[W]e, upon a large experience in the French literature, affirm that it would be nearly impossible (perhaps strictly so) to cite an instance of that cumbrous and unwieldy style which disfigures English composition so extensively.

Source: wiktionary