The word Undertok is misspelled against Undertook, which is past tense of "Undertake."
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Undertook has double "oo" is mispronounced as "o"
Remember double 'OO' in between the strings undert & k which should not be misspelled with single 'O'
Wrong Spelling: undert-o-k
Correct Spelling: undert-oo-k
Find more incorrect spellings of Undertook to spell right way.