announce v. 宣佈 ( 使公開地知道 ) ；通報…的出席、到來
【例】The captain announced that the plane was going to land.
機長宣佈飛機就要著陸了。
announce guests 通知客到
【根】an一再； nounce 報告，消息，資訊
→ 一再報告 →宣佈

-er 名詞字尾，動作產生者。