Gunstood or Gainstood: How To spell?

The word Gunstood is misspelled against Gainstood, which is past tense of "Gainstand"

Word contains consecutive vowels 'AI' in between alphabets g & nstood is misspelled as 'U'
Wrong Spelling:  g-u-nstood 
Correct Spelling:  g-ai-nstood 
Check more misspelled words of Gainstood to spell it correct.

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