adj
- stubborn; obstinate; contumacious
- sự ngoan cố: stiff neck
- tính ngoan cố: pertinacitytoughnesswilfulnessperversitytenaciousnesspersistenceperversenessrecalcitrationpersistencyobstinacystubbornnessfrowardnesspertainciousnessrecalcitranceegoismtenacity
- hơi ngoan cố: toughish