Decreseless or Decreaseless: How To spell?

The word Decreseless is misspelled against Decreaseless, an adjective meaning "Suffering no decrease."

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

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