The word Overstruned is misspelled against Overstrained, which is past tense of "Overstrain"
-->
Word contains consecutive vowels 'AI' in between alphabets overstr & ned is misspelled as 'U'
Wrong Spelling:  overstr-u-ned 
Correct Spelling:  overstr-ai-ned 
Check more misspelled words of Overstrained to spell it correct.