sooth ‧ say ‧ er /ˈsuːθˌseɪə $ -ər/ BrE AmE noun [countable]
[ Date: 1300-1400 ; Origin: sooth 'truth' (11-21 centuries) (from Old English soth , from soth 'true' ) + sayer ]
old use someone who is believed to be able to say what will happen in the future SYN clairvoyant