najhorší

worst(adjective)

bad to the greatest extent

That is the worst book I have ever read.

najhoršie

worst(adverb)

in the worst way or manner

This group performed worst (of all) in the test.

najhorší

worst(pronoun)

the thing, person etc which is bad to the greatest extent

the worst of the three; His behaviour is at its worst when he's with strangers; At the worst they can only fine you.