顽 ⇒
顽固 wángù, [頑固], stubborn/obstinate
顽强 wánqiáng, [頑強], tenacious/hard to defeat
顽皮 wánpí, [頑皮], naughty
老顽固 顽固不化 顽童 wántóng, [頑童], urchin
负隅顽抗 顽 wán, [頑], mischievous/obstinate/to play/stupid/stubborn/naughty
顽石 顽抗 冥顽 míngwán, [冥頑], stupid/stubborn
冥顽不灵 míngwánbùlíng, [冥頑不靈], stupid/stubborn/pigheaded
顽疾 wánjí, [頑疾], ineradicable disease/fig. deep-seated problem/perennial problem
顽固派 顽固性 顽症 wánzhèng, [頑症], stubborn illness/disease that is difficult to treat
死顽固 sǐwángù, [死頑固], very stubborn/very stubborn person/die-hard
钝 ⇒
迟钝 chídùn, [遲鈍], slow in one's reactions/sluggish (in movement or thought)
钝 dùn, [鈍], blunt/stupid
愚钝 yúdùn, [愚鈍], stupid/slow-witted
钝角 dùnjiǎo, [鈍角], obtuse angle
鲁钝 lǔdùn, [魯鈍], stupid/slow on the uptake