She wanted to know more.

Meaning: This sentence expresses the girl's desire to learn more about the secret she discovered.

Choice of Words: She is a personal pronoun that refers to a female person. Wanted is the past tense of the verb "to want" and it indicates that the desire to know more existed in the past. To is an infinitive marker that is used before verbs to indicate purpose or intention. Know is a verb that means to have knowledge or understanding of something.