ADVERBS Something; sometimes; still; than; thenSomething used adverbially, like "somewhat."
We should say "a somewhat round," placing the adverb between the article and the adjective so as to show unmistakeably that the adverb qualifies the adjective. "Something" may possibly be so taken (though "somehow" would make better sense) in
“A white head and something a round belly.
“This something-settled matter in his breast.