Strautening or Straitening: How To spell?

The word Strautening is misspelled against Straitening, which is present continuous of "Straiten"

Word contains consecutive vowels 'AI' in between alphabets str & tening is misspelled as 'AU'
Wrong Spelling:  str-au-tening 
Correct Spelling:  str-ai-tening 
Check more misspelled words of Straitening to spell it correct.

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