石炭井

石

• 化石 huà shí ㄏㄨㄚˋ ㄕˊ faa3 sek6 fossil
• 宝石 寶石 bǎo shí ㄅㄠˇ ㄕˊ bou2 sek6 precious stone; gem
• 岩石 yán shí ㄧㄢˊ ㄕˊ ngaam4 sek6 (geology) rock
• 石油 shí yóu ㄕˊ ㄧㄡˊ sek6 jau4 oil
• 石膏 shí gāo ㄕˊ ㄍㄠ sek6 gou1 gypsum CaSO4·2(H2O)

炭

• 煤炭 méi tàn ㄇㄟˊ ㄊㄢˋ mui4 taan3 coal
• 涂炭 塗炭 tú tàn ㄊㄨˊ ㄊㄢˋ tou4 taan3 extreme distress
• 木炭 mù tàn ㄇㄨˋ ㄊㄢˋ muk6 taan3 charcoal
• 泥炭 ní tàn ㄋㄧˊ ㄊㄢˋ nai4 taan3 peat
• 火炭 Huǒ Tàn ㄏㄨㄛˇ ㄊㄢˋ fo2 taan3 Fo Tan (area in Hong Kong)

井

• 三井 Sān jǐng ㄙㄢ ㄐㄧㄥˇ saam1 zeng2 Mitsui (Japanese company)
• 井上 Jǐng shàng ㄐㄧㄥˇ ㄕㄤˋ zeng2 soeng5 Inoue (Japanese surname, pr. "ee-no-oo-ay")
• 井下 jǐng xià ㄐㄧㄥˇ ㄒㄧㄚˋ zeng2 haa6 underground
• 井井 jǐng jǐng ㄐㄧㄥˇ ㄐㄧㄥˇ zeng2 zeng2 always clean
• 井口 jǐng kǒu ㄐㄧㄥˇ ㄎㄡˇ zeng2 hau2 mouth of a well

• 安如磐石 ān rú pán shí ㄢ ㄖㄨˊ ㄆㄢˊ ㄕˊ on1 jyu4 pun4 sek6 as solid as rock (idiom); as sure as houses
• 点石成金 點石成金 diǎn shí chéng jīn ㄉㄧㄢˇ ㄕˊ ㄔㄥˊ ㄐㄧㄣ dim2 sek6 sing4 gam1 to touch base matter and turn it to gold (idiom); fig. to turn crude writing into a literary gem
• 鼎铛玉石 鼎鐺玉石 dǐng chēng yù shí ㄉㄧㄥˇ ㄔㄥ ㄩˋ ㄕˊ ding2 caang1 juk6 sek6 lit. to use a sacred tripod as cooking pot and jade as ordinary stone (idiom); fig. a waste of precious material

• 生灵涂炭 生靈塗炭 shēng líng tú tàn ㄕㄥ ㄌㄧㄥˊ ㄊㄨˊ ㄊㄢˋ sang1 ling4 tou4 taan3 people are in a terrible situation (idiom)
• 雪中送炭 xuě zhōng sòng tàn ㄒㄩㄝˇ ㄓㄨㄥ ㄙㄨㄥˋ ㄊㄢˋ syut3 zung1 sung3 taan3 lit. to send charcoal in snowy weather (idiom)

• 背井离乡 背井離鄉 bèi jǐng lí xiāng ㄅㄟˋ ㄐㄧㄥˇ ㄌㄧˊ ㄒㄧㄤ bui3 zeng2 lei4 hoeng1 to leave one's native place, esp. against one's will (idiom)
• 避坑落井 bì kēng luò jǐng ㄅㄧˋ ㄎㄥ ㄌㄨㄛˋ ㄐㄧㄥˇ bei6 haang1 lok6 zeng2 to dodge a pit only to fall into a well (idiom)
• 从井救人 從井救人 cóng jǐng jiù rén ㄘㄨㄥˊ ㄐㄧㄥˇ ㄐㄧㄡˋ ㄖㄣˊ cung4 zeng2 gau3 jan4 to jump into a well to rescue sb else (idiom); fig. to help others at the risk to oneself