A strengthened form of
pro; a preposition of direction; forward to, i.e. Toward (with the genitive case, the side of, i.e. Pertaining to; with the dative case, by the side of, i.e. Near to; usually with the accusative case, the place, time, occasion, or respect, which is the destination of the relation, i.e. Whither or for which it is predicated) -- about, according to, against, among, at, because of, before, between, (where-)by, for, X at thy house, in, for intent, nigh unto, of, which pertain to, that, to (the end that), X together, to (you) -ward, unto, with(-in). In the comparative case, it denotes essentially the same applications, namely, motion towards, accession to, or nearness at.
see GREEK pro