Ponderous

Part of speech: adjective (a.)

1. Very heavy; weighty; as, a ponderous shield; a ponderous load; the ponderous elephant. The sepulcher . . . Hath oped his ponderous and marble jaws. Shak.

2. Important; momentous; forcible. "Your more ponderous and settled project." Shak.

3. Heavy; dull; wanting; lightless or spirit; as, a ponderous style; a ponderous joke. Ponderous spar (Min.), heavy spar, or barytes. See Barite.