Ponderous

Seals are clumsy and ponderous on land, but very graceful in the water.

Source: tatoeba (4426577)

The old professor's lectures are long-winded and ponderous.

Source: tatoeba (4426581)

Now for the ponderous goblet called the Queen, / of jewelled gold, which Belus used and they / of Belus' line, and poured the wine straightway.

Source: tatoeba (6800264)

A bird's-eye view of a large city in Japan presents an appearance quite unlike that presented by any large assemblage of buildings at home. A view of Tokio, for example, from some elevated point reveals a vast sea of roofs, the gray of the shingles and dark slate-color of the tiles, with dull reflections from their surfaces, giving a sombre effect to the whole. The even expanse is broken here and there by the fire-proof buildings, with their ponderous tiled roofs and ridges and pure white or jet-black walls. These, though in color adding to the sombre appearance, form, with the exception of the temples, one of the most conspicuous features in the general monotony. The temples are indeed conspicuous, as they tower far above the pigmy dwellings which surround them. Their great black roofs, with massive ridges and ribs, and grand sweeps and white or red gables, render them striking objects from whatever point they are viewed. Green masses of tree-foliage springing from the numerous gardens add some life to this gray sea of domiciles.

Source: tatoeba (9495174)