The word Unsetle is misspelled against Unsettle, meaning "To put into confusion."
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Unsettle has double "tt" is mispronounced as "t"
Remember double 'TT' in between the strings unse & le which should not be misspelled with single 'T'
Wrong Spelling:  unse-t-le 
Correct Spelling:  unse-tt-le 
Explore spell check of Unsettle to spell without errors.