stubborn(refusing to move or change one's opinion) adjective [UK: ˈstʌ.bən] [US: ˈstʌ.bərn]I don't like stubborn people. = No me gustan las personas cabezadura.
cabeza duraadjective
dense [denser, densest](slow to comprehend; of low intelligence) adjective [UK: dens] [US: ˈdens]