Mainshet or Mainsheet: How To spell?
The word Mainshet is misspelled against Mainsheet, a noun meaning "One of the ropes by which the mainsail is hauled aft and trimmed."
Mainsheet has double "ee" is mispronounced as "e"Remember double 'EE' in between the strings Mainsh & t which should not be misspelled with single 'E'
Wrong Spelling:  Mainsh-e-t  Correct Spelling:  Mainsh-ee-t 
Find more wrongly spelled words of Mainsheet to spell it well.