Infast or Infaust: How To spell?

The word Infast is misspelled against Infaust, an adjective meaning "Not favorable; unlucky; unpropitious; sinister."

Word contains consecutive vowels 'AU' in between alphabets inf & st is misspelled as 'A' as letter 'U' is phonetically ignored
Wrong Spelling:  inf-a-st 
Correct Spelling:  inf-au-st 
Browse incorrect spellings of Infaust to spell it good.

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