obstinate
OB-stuh-nitadjMeaning stubbornly refusing to change one’s mind or plan
Memory hook STANDS IN the way: ob-STIN-ate. The donkey stands in the middle of the gate, and no amount of pushing will move it: it is obstinate.
The obstinate toddler refused to wear anything but her rain boots, even on a sunny day.
In context Everyone else agreed the trail was washed out, but Uncle Victor was obstinate; he insisted on hiking it anyway and came back two hours later, muddy to the knees.
Similar stubborn, headstrong, pigheaded, inflexible
Opposite flexible, agreeable, compliant
From Latin obstinatus, “determined,” from obstinare (to persist): ob- (in the way) + a part akin to stare (to stand).