Cambridge English: CPE (C2 Proficiency) - Matigas ang Ulo at Katigasan ng Ulo

difficult to get along with and easily angered

openly defiant of rules, orders, or control

rigidly attached to a theory or set of beliefs, ignoring whether they are practical or realistic

convinced that everything one believes in is true and others are wrong

difficult to deal with, stubbornly contrary, or disobedient

relentless in anger, pursuit, or resistance

unwillingness to agree about something or change one's views

difficult to manage, control, or resolve

stubbornly refusing to change one's behavior or course, especially in doing wrong

resisting authority, control, or guidance

hard to control because of stubbornness

firmly and uncompromisingly committed to a belief, habit, or way of thinking

resistant to reform despite repeated efforts to change behavior

inclined to act stubbornly and to hang on to what is wrong

having a limited perspective or outlook, often isolated and closed off from new ideas or influences