ponderous
Cross references: 1. heavy pon.der.ous \'pa:n-d(*-)r*s\ aj [ME, fr. MF pondereux, fr. L ponderosus, fr. ponder-, pond]us weight 1: of very great weight 2: unwieldy or clumsy because of weight and size 3: oppressively or unpleasantly dull : PEDESTRIAN - pon.der.ous.ly av