Jawaban:

1. "Aduerti semen" is not a phrase in English or Latin, and appears to be a misspelling. Without further context or clarification, it is difficult to determine the meaning.
2. "Invitation" refers to a request or offer to participate in an event or activity. It is a written or spoken message that invites someone to do something, such as attend a party, a meeting, a wedding, or any other occasion.
3. "Announcement" refers to a formal public statement or message that informs people about something significant, such as an event, a decision, a change, a news story, or a new product or service. It can be made in various formats, such as written or spoken, and can be communicated through different channels, such as print, broadcast, or online media.