Thraten or Threaten: How To spell?

The word Thraten is misspelled against Threaten, a verb meaning "To use threats, or menaces; also, to have a threatening appearance."

Threaten has vowels 'ea' together mispronounced as 'a'
Word contains consecutive vowels 'EA' in between alphabets thr & ten is misspelled as 'A'
Wrong Spelling:  thr-a-ten 
Correct Spelling:  thr-ea-ten 
Explore spell check of Threaten to spell without errors.

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