The word Misive is misspelled against Missive, meaning "A message in writing."
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Missive has double "ss" is mispronounced as "s"
Remember double 'SS' in between the strings mi & ive which should not be misspelled with single 'S'
Wrong Spelling: mi-s-ive
Correct Spelling: mi-ss-ive
Find more wrongly spelled words of Missive to spell it well.