1 by surprise; unexpectedly 吃惊地; 未料到地
*She came upon him unawares as he was searching her room. 她撞见他正在搜查她的房间.
2 without being aware; unconsciously 不知不觉地; 无意地
*I must have dropped my keys unawares.我准是不留神把钥匙丢了.
3 (idm 习语) catch/take sb una`wares surprise or startle sb 使某人吃惊; 把某人吓一跳
*You caught us unawares by coming so early. 你来得这么早, 我们都很惊讶.
take/catch sb unawares
if something takes you unawares, it happens when you are not expecting it and are not prepared
The question caught me completely unawares.
formal without noticing
We had walked unawares over the border.