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be a collier
collier 是可数名词，指煤矿工人。
He is a collier.
他是一名煤矿工人。
煤矿工人
colliers — plural of collier
先理解核心含义，再看它在真实句子里的用法。
煤矿工人
someone who works in a coal mine
He is a collier.
他是一名煤矿工人。
从事煤炭生产或销售的人
A person in the business or occupation of producing or distributing coal (any of several types of carbon fuel).
运煤船
A vessel carrying a bulk cargo of coal.
运煤船上的水手
A sailor on such a vessel.
My grandfather worked as a collier for forty years.
我的祖父当了四十年煤矿工人。
The collier put on his helmet before entering the dark mine.
这位煤矿工人在进入黑暗的矿井前戴上了头盔。
Many colliers in this region travel to work before sunrise.
这个地区的许多煤矿工人日出前就去上班。
collier 是可数名词，指煤矿工人。
He is a collier.
他是一名煤矿工人。
My uncle worked as a collier for years.
我叔叔当了多年煤矿工人。
He became a collier at eighteen.
他十八岁时成为煤矿工人。
who 引导的定语从句修饰 collier。
The collier who lives next door is retired.
住在隔壁的那位煤矿工人已经退休了。
Not this
He is collier.
Use this
He is a collier.
collier 是可数名词，单数形式作表语时需加不定冠词 a，表示“一个”，中文没有冠词，容易遗漏。
Not this
There are many collier in the mine.
Use this
There are many colliers in the mine.
collier 是可数名词，复数形式为 colliers，在 many 后需用复数，中文名词没有复数变化，容易忘记加 s。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
矿工灯
A collier's lamp hangs in the museum.
博物馆里挂着一盏矿工灯。
矿工小屋
They lived in a collier's cottage.
他们住在一间矿工小屋里。
矿工家庭
A collier's family often faced severe hardship.
矿工家庭常常面临严重的困难。
Use colliers naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把collier拆成coal（煤）+ -ier（表人），联想为“和煤打交道的人”，就是煤矿工人；运煤船也装煤，同根同源。
语域：formal 常见场景：historical writing、literature、mining history 在现代日常英语中，说到“煤矿工人”通常直接用 coal miner；collier 是比较旧的书面说法，多出现在历史叙述、文学作品或行业史资料里，带有正式色彩。
没有与 /ˈkɒljə/ 完全押韵的高频单词；最接近的是 colliery，它包含同样的 /ˈkɒljə/ 开头，再加 /ri/。拼写相似的 collar（/ˈkɒl.ər/）和 jollier（/ˈdʒɒl.i.ər/）读音都不与 collier 相同；stallion、scallion 都是 /ljən/ 结尾，但重读元音为 /æ/，注意别混淆。
Dictionary facts from ECDICT, WIKTIONARY.