gerundally

— Μορφὴν δοvλοv λαβών, and took upon Him (taking) the form of a servant. The participle λαβὼν is to be taken gerundally—by taking, showing the way how He humbled Himself. […] Ἐν ὁμοιώματι ἀνθρώπων γενόμενος, and was made (being made) in the likeness of men. Here again the participle γενόμενος, which is a further expansion of the preceding subject, is to be taken gerundally—by being made or becoming in the likeness of men.