Meaning

noun the least favorable outcome

noun the greatest damage or wickedness of which one is capable

noun the weakest effort or poorest achievement one is capable of

originFrom Middle English worste, wurste, warste, werste, wirste, from Old English wierrest, from Proto-Germanic *wirsistaz, superlative form of *ubilaz (“bad, evil”); compare worse. Cognate with Old Saxon wirsista, wirrista (“worst”), Old High German wirst, wirsesto, wirsisto (“worst”), Danish værst (“worst”), Swedish värst (“worst”), Icelandic verstur (“worst”).

Etymology from Wiktionary, CC BY-SA 3.0