Adjective + なる
The verb なる means "to become." It indicates a change, and can follow nouns and both types of adjectives. With いadjectives the final い is dropped and く is added.
あたたかい → あたたかくなる to become warm/warmer
しずか（な） → しずかになる to become quiet/quieter
かいししゃいん → かいしゃいんになる to become a company employee
I have grown fond of studying the Japanese language.