Weghlock or Weighlock: How To spell?

The word Weghlock is misspelled against Weighlock, a noun meaning "A lock, as on a canal, in which boats are weighed and their tonnage is settled."

Word contains consecutive vowels 'EI' in between alphabets w & ghlock is misspelled as 'E' as letter 'I' is phonetically ignore
Wrong Spelling:  w-e-ghlock 
Correct Spelling:  w-ei-ghlock 
Find more incorrect spellings of Weighlock to spell right way.