unrivaled

Meanings

1. 1
   adj

   having no equal or competitor; better or greater than all others of the same kind

   Her unrivaled knowledge of the archive made the new history unusually authoritative.

Formed from un-, 'not,' + rivaled, from rival. Rival came through French from Latin rivalis, originally one who shared the use of a stream and therefore might compete for its water. Unrivaled literally means 'not matched by a rival.' Unrivalled is the usual British spelling.

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