Comparative form of wicked: more wicked(adjective)
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Use "wickeder" in a sentence
"Lip-lip continued so to darken his days that White Fang became wickeder and more ferocious than it was his natural right to be."
"Maine strawberries home-canned peaches even wickeder indulgences, but with major downward motion on the scale"
"They looked even wickeder at close quarters, but they squatted down, and the leader raised a hand to Wootton and grunted something that sounded like a mortal insult, but was presumably a greeting."