The word Sucumbing is misspelled against Succumbing, which is present continuous of "Succumb"
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Succumbing has double "cc" is mispronounced as "c"
Remember double 'CC' in between the strings Su & umbing which should not be misspelled with single 'C'
Wrong Spelling:  Su-c-umbing 
Correct Spelling:  Su-cc-umbing 
Check more misspelled words of Succumbing to spell it correct.