(kān, ㄎㄢ) to look after; to take care of; to watch; to guard [CE-DICT]
(kàn, ㄎㄢˋ) it depends; think; to see; to look at [CE-DICT]
那
(nǎ, ㄋㄚˇ) variant of 哪; how; which [CE-DICT]
(nà, ㄋㄚˋ) that; those; commonly pr. nei4 before a classifier, esp. in Beijing [CE-DICT]
块
(kuài, ㄎㄨㄞˋ) lump (of earth); chunk; piece; classifier for pieces of cloth, cake, soap, etc.; colloquial word for yuan (or other unit of currency such as Hong Kong or US dollar etc), usually as 塊錢|块钱 [CE-DICT]
污
(wū, ㄨ) dirty; filthy; foul; corrupt; to smear; to defile; dirt; filth [CE-DICT]