IPA: /ˈsuːθseɪə/
KK: /ˈsuːθseɪər/
A person who claims to predict future events or outcomes, often using mystical or intuitive methods.
The soothsayer warned the king about the dangers that lay ahead.
Soothsayer → It is formed from "sooth" (from Old English *sōþ*, meaning truth) and "sayer" (from Old English *secgan*, meaning to say or tell). A soothsayer is someone who tells the truth or predicts the future.
Think of someone who tells the 'truth' ('sooth') about what will happen — that's why a soothsayer is a person who predicts the future.
No commonly confused words.