worst

Most inferior, as in quality, condition, or effect.

Most severe or unfavorable.

Being furthest from an ideal or a standard; least desirable or satisfactory.

In the worst manner or degree.

To gain the advantage over; defeat.

Something that is worst.

(at (the) worst) Under the most negative circumstances, estimation, or interpretation.

(get/have) To suffer a defeat or disadvantage.

(if (the) worst comes to (the) worst) If the very worst thing happens.

(in the worst way) Very much; a great deal.