1
be a boarder at [school]
boarder 后可接 at + 学校，表示在某校寄宿。
She was a boarder at a school in the mountains.
她曾是一所山区学校的寄宿生。
房客；寄宿者
先理解核心含义，再看它在真实句子里的用法。
房客；寄宿者
a tenant who lives in someone else's house
She was a boarder at a school in the mountains.
她曾是一所山区学校的寄宿生。
此处指寄宿在别人家里的房客，非学校寄宿生。
学期期间住在学校的学生。
A pupil who lives at school during term time.
某人房屋中的房客
a tenant in someone's house
在私人住宅而非旅馆付费食宿的人。
Someone who pays for meals and lodging in a house rather than a hotel.
强行登船的人
someone who forces their way aboard ship
Our boarder pays rent on the first day of every month.
我们的房客每月第一天付房租。
AI contextual example
She has three boarders who all share the kitchen.
她有三个房客，他们共用厨房。
AI contextual example
As a boarder, he gets breakfast and dinner with the family.
作为寄宿者，他和这家人一起吃早餐和晚餐。
AI contextual example
stand by to repel boarders
准备击退登船者
WordNet
boarder 后可接 at + 学校，表示在某校寄宿。
She was a boarder at a school in the mountains.
她曾是一所山区学校的寄宿生。
take in a boarder 指在家里收留付费寄宿者，这时的 boarder 相当于房客。
They took in a boarder to help with the rent.
他们收了一个房客来分担房租。
Not this
The two countries share a long boarder.
Use this
The two countries share a long border.
boarder是名词，意为“寄宿生、房客”；border才表示“边界”。二者读音相近但拼写和意思不同，此处指国家之间的分界线，应使用border。
Not this
I boarder the train at platform 2.
Use this
I board the train at platform 2.
boarder是名词，不可作动词。表示“登上（火车、飞机等）”应用动词board，此处把名词误当动词使用。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
付费寄宿者
The old couple advertised for a paying boarder to help with the bills.
那对老夫妇登广告找一位付费寄宿者来分担账单。
收寄宿者；接受房客
After her husband died, she took in boarders to earn extra money.
丈夫去世后，她收寄宿者来赚点外快。
全寄宿生；住校生
As a full boarder, he stayed at school for the whole semester.
作为全寄宿生，他整个学期都住在学校。
每周寄宿生（平时住校，周末回家）
She was a weekly boarder and went home every Friday evening.
她是每周寄宿生，每周五晚上回家。
Use boarder naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记住 board（食宿）+er，就是寄宿生/房客；border 才是边境。
语域：mixed 常见场景：rental agreements、boarding-house notices、everyday speech 作为“房客/寄宿者”解时，该词正式程度随语境变化：租赁合同、房屋通知等书面语中比较多见，日常口语中也可使用，但更常用 lodger 或 tenant。
注意 boarder 与 border 拼写不同：boarder 指寄宿者，border 指边界。
Dictionary facts from ECDICT, WIKTIONARY.