dominate, master -- (have dominance or the power to defeat over; "Her pain completely mastered her"; "The methods can master the problems")
master, control -- (have a firm understanding or knowledge of; be on top of; "Do you control these data?")
Overview of adj master
The adj master has 1 sense
chief, main, primary, principal, master -- (most important element; "the chief aim of living"; "the main doors were of solid glass"; "the principal rivers of America"; "the principal example"; "policemen were primary targets"; "the master bedroom"; "a master switch")