Decresed or Decreased: How To spell?

The word Decresed is misspelled against Decreased, which is past tense of "Decrease"

--> Decreased has vowels 'ea' together mispronounced as 'e'
Word contains consecutive vowels 'EA' in between alphabets decr & sed is misspelled as 'E'
Wrong Spelling:  decr-e-sed 
Correct Spelling:  decr-ea-sed 
Explore spell check of Decreased to spell without errors.

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