Mas·ter·ful·ly, adv. In a masterful manner; imperiously.
A lawless and rebellious man who held lands masterfully and in high contempt of the royal authority. --Macaulay.
◄ ►
masterfully
adv 1: in a skillfully masterful manner; with the skill of a
master; "the young boy played the violin sonata
masterfully"
2: in a domineering and masterful manner; "his gaze held hers
masterfully"