pervicacious

[ pur-vi-key-shuh s ]
/ ˌpɜr vɪˈkeɪ ʃəs /

adjective

extremely willful; obstinate; stubborn.

Origin of pervicacious

1625–35; < Latin pervicāc-, stem of pervicāx stubborn, willful ( per- per- + vic-, variant stem of vincere to conquer (see victor) + -āx adj. suffix denoting tendency or ability) + -ious

OTHER WORDS FROM pervicacious

per·vi·ca·cious·ly, adverb per·vi·ca·cious·ness, noun