Overstreining or Overstraining: How To spell?
The word Overstreining is misspelled against Overstraining, which is present continuous of "Overstrain"
Word contains consecutive vowels 'AI' in between alphabets overstr & ning is misspelled as 'EI'Wrong Spelling:  overstr-ei-ning  Correct Spelling:  overstr-ai-ning 
Find more wrongly spelled words of Overstraining to spell it well.