The word Siped is misspelled against Sipped, which is past tense of "Sip"
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Sipped has double "pp" is mispronounced as "p"
Remember double 'PP' in between the strings si & ed which should not be misspelled with single 'P'
Wrong Spelling:  si-p-ed 
Correct Spelling:  si-pp-ed 
Find more wrongly spelled words of Sipped to spell it well.