unawares
/-ˈweəz; -`wɛrz/ adv
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. 你来得这麽早, 我们都很惊讶.