「気軽」は、あまり深く考えず、リラックスして何かをする様子を表す言葉です。

"気軽" is a word that expresses doing something in a relaxed way without thinking too deeply.

「気軽に話しかけてね」のように、相手が緊張しなくていいと伝えるときによく使います。

It is often used to tell someone they don't need to be nervous, as in "気軽に話しかけてね" (Feel free to talk to me).