You use somewhat to indicate that something is the case to a limited extent or degree. He explained somewhat unconvincingly that the company was paying for everything Although his relationship with his mother had improved somewhat, he was still depressed. more than a little but not very somewhat larger/higher/newer etc
to a moderately sufficient extent or degree; "the shoes are priced reasonably"; "he is fairly clever with computers"; "they lived comfortably within reason"
to a small degree or extent; "his arguments were somewhat self-contradictory"; "the children argued because one slice of cake was slightly larger than the other"