worst

Defeat thoroughly.

(superlative of `bad') most wanting in quality or value or condition.

“the worst player on the team”

“the worst weather of the year”

The greatest damage or wickedness of which one is capable.

“the invaders did their worst”

“so pure of heart that his worst is another man's best”

The least favorable outcome.

“the worst that could happen”

The weakest effort or poorest achievement one is capable of.

“it was the worst he had ever done on a test”