i Register
In some senses, mastery is marked as obsolete. Watch for register when choosing this word.
ADJ
absolute, complete, total
gradual
Through daily practice, she gained gradual mastery of the piano over several years.
practical, technical
She demonstrated practical mastery of the software after just two weeks of training.
VERB + MASTERY
have
After years of practice, she finally had mastery of the piano and could play any piece beautifully.
demonstrate, display, show
The young pianist demonstrated remarkable mastery of the difficult sonata.
achieve, acquire, attain, gain
PREP
~ of
She demonstrated mastery of the piano after years of dedicated practice.
~ over
After years of practice, she finally gained mastery over her fear of public speaking.