Antonyms of adj unsurpassed

1 sense of unsurpassed

Sense 1
unexcelled, unexceeded, unsurpassed -- (not capable of being improved on)

INDIRECT (VIA best) -> worst -- ((superlative of `bad') most wanting in quality or value or condition; "the worst player on the team"; "the worst weather of the year")

Similarity of adj unsurpassed

1 sense of unsurpassed

Sense 1
unexcelled, unexceeded, unsurpassed -- (not capable of being improved on)
       => best (vs. worst) -- ((superlative of `good') having the most positive qualities; "the best film of the year"; "the best solution"; "the best time for planting"; "wore his best suit")

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