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The Collaborative International Dictionary
Conculcate

Conculcate \Con*cul"cate\, v. t. [imp. & p. p. Concultated; p. pr. & vb. n. Conculcating.] [L. conculcatus, p. p. of conculcare to conculcate fr. calx heel.] To tread or trample under foot. [Obs.]
--Bp. Montagu -- Con`cul*ca"tion, n. [Obs.]

Wiktionary
conculcate

vb. (context transitive obsolete English) To tread or trample underfoot.