Sayne or Seine: How To spell?

The word Sayne is misspelled against Seine, a noun meaning "A large net, one edge of which is provided with sinkers, and the other with floats. It hangs vertically in the water, and when its ends are brought together or drawn ashore incloses the fish."

Word contains consecutive vowels 'EI' in between alphabets s & ne is misspelled as 'AY'
Wrong Spelling:  s-ay-ne 
Correct Spelling:  s-ei-ne 
Explore spell check of Seine to spell without errors.