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The word "invitations" is commonly used in English to refer to the formal announcements sent to guests to inform them of an upcoming event, such as a wedding, birthday party, or formal dinner. Invitations are essential for planning and organizing these events, as they serve as a means of communication between the host and the attendees. They typically include details about the event, such as the date, time, location, dress code, and RSVP instructions. Crafting thoughtful and elegant invitations can set the tone for the occasion and express the host's appreciation for the guests' presence.