thickheadedly
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thickheadedly — thick·head·ed·ly … English syllables
thickheaded — thickheadedly, adv. thickheadedness, n. /thik hed id/, adj. 1. (of a person) dull witted; stupid. 2. (of an animal) having a thick head. [1700 10; THICK + HEADED] * * * … Universalium