adverb

by a considerable amount; very much.

I admire him greatly

very much,much,by a considerable amount,considerably,to a great extent,substantially,appreciably,significantly,markedly,sizeably,seriously,materially,signally,profoundly,to a great extent/degree,enormously,vastly,immensely,tremendously,hugely,mightily,abundantly,extremely,exceedingly,remarkably,plenty,majorly,well,to the nth degree,bigly