Boyav or Boyau: How To spell?
The word Boyav is misspelled against Boyau, a noun meaning "A winding or zigzag trench forming a path or communication from one siegework to another, to a magazine, etc."
Word ends with consecutive vowels 'AU' preceded by alphabets 'boy' is misspelled as 'AV'Wrong Spelling:  boy-av  Correct Spelling:  boy-au 
Find more incorrect spellings of Boyau to spell right way.