Anyone
Anyone is an indefinite pronoun used to refer to any person in a group, without specifying who. It expresses general accessibility or openness and is common in questions, negatives, and conditional clauses. In most contexts it is treated as singular, taking a singular verb: Anyone is welcome. In modern English, singular they is often used to avoid gendered language: If anyone is available, they can assist.
Etymology and form: Anyone derives from any + one, with earliest attestations in the early modern period.
Usage and nuance: Anyone is closely related to anybody, with subtle differences in formality and regional preference;
Examples: Has anyone seen my keys? If anyone has a question, please raise your hand. Anyone who