In a natural manner.
"She smiled naturally, as if she hadn't just received the news of her promotion."
In plain English: Naturally means something happens in the normal way without any special effort or outside help.
"She naturally smiled when she saw her friend arrive."
Usage: Use "naturally" to describe an action performed in an authentic or unforced way, such as moving gracefully without artificial effort. It emphasizes that something happens organically rather than through deliberate manipulation.
The word naturally comes from Middle English by adding the suffix -ly to the adjective natural. It has retained its original meaning of "in a manner consistent with one's nature" since it entered the language.