de-Sunnify verb1 •To deprive of Sunniness; to decrease the Sunni character of.Whether the United States intended to deSunnify Iraq and change the regional balance of power from Sunni to Shia leadership did not matter at this point. Sunnis were now convinced this was the case. — 2011 formsde-Sunnified · de-Sunnifying · de-Sunnifies