adj. 25B6; adjective
a masterful man : COMMANDING, powerful, imposing, magisterial, lordly, authoritative; dominating, domineering, overbearing, overweening, imperious.
their masterful handling of the situation : EXPERT, adept, clever, masterly, skilful, skilled, adroit, proficient, deft, dexterous, accomplished, polished, consummate; informal crack, ace.
weak, inept.