worst · adjective /wɜːrst/Full view
worst
A2 (superlative of bad) the most unpleasant, difficult or severe
Dictionary examples:

That was the worst meal I've ever eaten.

"It was the worst moment of my life," she admitted.

Learner example:

And you, what is your worst gift? (Preliminary English Test; B1; French)

worst · noun no plural /wɜːrst/
worst
B1 the most unpleasant or difficult thing, person, or situation
Dictionary example:

That was the worst I've seen him play in several years.

Learner example:

This situation was the worst I have lived [through]. (Preliminary English Test; B1; Spanish)

worst of all
B2 used to emphasize the worst thing, situation, etc.
Dictionary example:

We had no food or light, but worst of all, we had no water.

Learner example:

And worst of all, her mother had been always against that relationship and had given her advice many times. (First Certificate in English; B2; Japanese)

fear the worst
C2 to worry that something very bad will happen or that something very bad has happened
Dictionary example:

When there was no sign of the children, the rescuers feared the worst.

Learner example:

Her parents had been quar[re]lling constantly now for almost half [a] year, and she feared the worst. (Certificate of Proficiency in English; C2; Swedish)

worst · adverb /wɜːrst/
worst
B2 (superlative of badly) the most badly
Dictionary examples:

Small businesses have been worst hit by the recession.

Roads on the western slopes were worst affected by the snow.

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