This is the 12885th most frequent Russian word.
легко
Easily.
In this sentence, 'легко' is used as an adverb to describe the ease of performing an action.
Это упражнение делать легко.
Doing this exercise is easy.
Here, 'легко' expresses the simplicity of becoming accustomed to something.
Лёгко привыкнуть к хорошему.
It's easy to get used to good things.
'Легко' is used in conjunction with 'даётся' to indicate an action or skill that is acquired with ease.