When some is used without a number, most commentators feel that somewhat is to be preferred. Their advice is an oversimplification, however; only when some modifies an adjective, usually a comparative, will somewhat always substitute smoothly. When some modifies a verb or adverb, and especially when it follows a verb, substitution of somewhat may prove awkward The lawnmower you came home with did not quite fit the description of the dishwasher you went shopping for. The lawnmower you came home with did not quite fit the description of the dishwasher you went shopping for.