Underseting or Undersetting: How To spell?
The word Underseting is misspelled against Undersetting, a noun meaning "Something set or built under as a support; a pedestal."
Undersetting has double "tt" is mispronounced as "t"Remember double 'TT' in between the strings underse & ing which should not be misspelled with single 'T'
Wrong Spelling:  underse-t-ing  Correct Spelling:  underse-tt-ing 
Find more wrongly spelled words of Undersetting to spell it well.