The word Sething is misspelled against Seething, which is present continuous of "Seethe"
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Seething has double "ee" is mispronounced as "e"
Remember double 'EE' in between the strings S & thing which should not be misspelled with single 'E'
Wrong Spelling:  S-e-thing 
Correct Spelling:  S-ee-thing 
Find more wrongly spelled words of Seething to spell it well.