Pervicacious (adj)
pur-vic-ay-shus
Extremely willful; obstinate; stubborn.
Pervicacious comes from Latin pervicāx, meaning “stubborn, willful” or, more literally, “tending to conquer completely.”
Example sentences
“When the dog walker wanted to change direction, the pervicacious Yorkie dug her nails into the ground and glared.”