1
a hooper who ...
who 引导定语从句，修饰 hooper。
A hooper who repairs wooden barrels is rare.
修理木桶的箍桶匠很少见。
箍桶匠
先理解核心含义，再看它在真实句子里的用法。
箍桶匠
a person who hoops casks or tubs; a cooper
A hooper who repairs wooden barrels is rare.
修理木桶的箍桶匠很少见。
欧洲啸天鹅(Cygnus cygnus)。
The European whistling, or wild, swan (Cygnus cygnus).
给桶或盆加箍的人。
One who applies hoops to casks or tubs.
玩呼啦圈的人。
One who hula hoops.
The hooper repaired the old wine cask before the harvest.
桶匠在收获前修好了旧葡萄酒桶。
My grandfather learned the skill from a village hooper who made barrels for the local brewery.
我祖父从一位为当地啤酒厂制作木桶的乡村桶匠那里学到了这门手艺。
The hooper soaked the wooden staves and then bound them with iron rings.
桶匠把木桶板浸湿，然后用铁箍把它们箍紧。
who 引导定语从句，修饰 hooper。
A hooper who repairs wooden barrels is rare.
修理木桶的箍桶匠很少见。
名词后加 's 表示所有格。
The hooper's tools hang on the wall.
箍桶匠的工具挂在墙上。
as 短语表示职业身份。
She works as a hooper at the brewery.
她在啤酒厂当箍桶匠。
Not this
He hoopers the barrel to make it watertight.
Use this
He hoops the barrel to make it watertight.
hooper 是名词，意为“箍桶匠”，不能当动词用。表示“给桶箍上铁箍”的动词是 hoop，第三人称单数是 hoops，所以应把 hoopers 改成 hoops。
Not this
The hooper came off the barrel, so the planks separated.
Use this
The hoop came off the barrel, so the planks separated.
hooper 指人（桶匠），而桶上起固定作用的金属环是 hoop。此处描述铁箍脱落，应使用名词 hoop，不能用指人的 hooper。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
技艺娴熟的箍桶匠
The old man was a skilled hooper who repaired barrels for the village.
这位老人是技艺娴熟的箍桶匠，为村里修理木桶。
箍桶手艺
The hooper's craft has largely disappeared in modern times.
箍桶手艺在现代已基本消失。
大天鹅
A hooper swan flew over the lake at dawn.
一只大天鹅在拂晓时飞过湖面。
箍桶大师
He became a master hooper after thirty years of apprenticeship.
经过三十年学徒生涯，他成了箍桶大师。
发长 /uː/ 音 (如 food, boot)
Use hooper naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想：hooper 拿着铁箍（hoop）给木桶上箍，所以是箍桶匠；它又指大天鹅，因为叫声像“hoo”。
语域：formal 常见场景：historical writing、trade glossaries、traditional barrel-making trade 这个词在现代英语中并不常用，多出现在历史文献或专业描述里，带有较浓的书面/正式色彩。表达“桶匠”时，日常生活里更常说 cooper。
该词有两个名词义项：一为“桶匠”；一为“啸声天鹅”。
Dictionary facts from ECDICT, WIKTIONARY.
Watch the sound change