When they did not hear from her, they feared the worst.

他们听不到她的消息时，唯恐发生了最坏的事。

《牛津词典》

Monica: You actually broke her watch? Wow! The worst thing I ever did was, I-I shredded by boyfriend's favorite bath towel.

莫妮卡：你真的砸了她的手表？哇！我干过的最坏的事情就是，我撕碎了我男朋友最喜欢的浴巾。

youdao

Although she brought with her flood waters in some low-lying areas, ultimately Irene did not live up to weather forecasters' worst fears.

尽管艾琳把一些洪水带到一些低洼地带，但是艾琳最终并没有达到气象预报员所最担心的程度。

youdao

Homeowners on the East Coast are finding that out after Hurricane Sandy attacked and did her worst.

FORBES: How to Get an Insurance Claim Paid

Did Ms. Morrell remember the best and worst wines her guests had brought?

WSJ: Houseguest Wine: Yes to Albari?o, No to Malbec | On Wine by Lettie Teague