This is the 7536th most frequent Chinese word.
變得
"變得" means "to become" or "to turn into."
The word "變得" here signifies a change of state towards being hardworking.
他最近變得很努力。
He has recently become very hardworking.
The use of "變得" indicates a gradual transformation to a more complex state.
事情變得越來越複雜了。
Things have become more and more complicated.
"變得" is used to describe a change in the state of warmth in the weather.