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mastery
mastery UK /ˈmɑːs.t(ə.)ɹi/ US /ˈmæs.tɚ.i/noun
card 1 of 10 · preposition
She demonstrated mastery _____ the piano after years of dedicated practice.
card 1 of 10 · preposition
She demonstrated mastery _____ the piano after years of dedicated practice.