A2
(superlative of bad) the most unpleasant, difficult or severe
Dictionary examples:
My worst math mistake was thinking 2+2=22. (0.0)
My worst haircut made me look like a sad mop. (0.0)
The worst driver thought red lights meant 'go faster'. (0.0)
That was the worst meal I've ever eaten. (13.5)
"It was the worst moment of my life," she admitted. (19.3)