master
noun
a person with the ability or power to use, control, or dispose of something.
has been mastering
-
present perfect progressiveof master (3rd person singular).present perfect progressive
Used to describe an action that began in the past, has continued continuously, and is still in progress.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Wagashi are traditional, very pretty Japanese confections often served with tea, and Toraya, which has a counter here, has been mastering the craft since the 16th century.
From The Wall Street Journal ● Jan. 28, 2016
An even tougher problem has been mastering the variety of electrical voltages used by the various nations.
From Time Magazine Archive
