unannounced
/ˌʌn.əˈnaʊnst/
形容词
未宣布的，未公布的
The Texan singer will be supported by two other bands, as yet unannounced.
这位得克萨斯歌手将由另外两支乐队伴奏，但还没公布是哪两支乐队。
/ˌʌn.əˈnaʊnst/
形容词、副词
（某人的到来）未通知的（地），未打招呼的（地）；突然的（地）
She appeared unannounced and took control of the meeting.
她突然出现并控制了会议。