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unaccompanied + [noun]
作前置定语，常见于旅行、法律等正式语境。
The airline provides special assistance for unaccompanied minors.
这家航空公司为无人陪伴的未成年人提供特别协助。
无人陪伴的；无伴的
先理解核心含义，再看它在真实句子里的用法。
无人陪伴的；无伴的
without an escort or companion; alone
The airline provides special assistance for unaccompanied minors.
这家航空公司为无人陪伴的未成年人提供特别协助。
无人陪伴的旅行。
travelling without companions
无伴奏演奏或编写的；独奏的。
performed or scored without accompaniment; solo
The airline requires unaccompanied minors to be registered at the check-in desk.
航空公司要求无人陪伴的未成年人在值机柜台登记。
She felt a little nervous about arriving unaccompanied at the wedding reception.
她对于独自到达婚宴现场感到有点紧张。
I prefer to explore the museum unaccompanied so I can set my own pace.
我更喜欢独自逛博物馆，这样我可以自己掌握节奏。
作前置定语，常见于旅行、法律等正式语境。
The airline provides special assistance for unaccompanied minors.
这家航空公司为无人陪伴的未成年人提供特别协助。
用于正式或书面英语，表示没有某事物同时发生或存在，后接名词或名词短语。
The announcement was unaccompanied by any official explanation.
这一声明没有附带任何官方解释。
用于音乐语境，表示演唱或演奏时没有器乐伴奏。
She sang unaccompanied.
她无伴奏演唱。
Not this
She traveled unaccompaniedly to the concert.
Use this
She traveled unaccompanied to the concert.
unaccompanied 是形容词，不要加 -ly 拼成副词；在 travel 这类动词后直接用形容词作主语补足语，表示‘无人陪伴地’这一状态。
Not this
The child was left lonely at the airport.
Use this
The child was left unaccompanied at the airport.
lonely 意为‘孤独、寂寞’，指主观感受；unaccompanied 意为‘无人陪伴、无人照看’，是客观状态。若表达的是没有陪同，应使用 unaccompanied。
Not this
Minors unaccompanied with their parents are not allowed.
Use this
Minors unaccompanied by their parents are not allowed.
unaccompanied 和 accompanied 一样，表示‘由……陪伴’时要用介词 by 引出陪伴者，不用 with；把 with 改为 by 后介词短语才能正确修饰 unaccompanied。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
无人陪伴的未成年人（无成人随行）
The unaccompanied minor was escorted to the boarding gate by airline staff.
这名无人陪伴的未成年人由航空公司工作人员护送到登机口。
分离托运的行李（不随乘客同机）
If you send your luggage as unaccompanied baggage, it may arrive a day later.
如果你把行李作为分离托运的物品寄运，它可能会晚一天到达。
没有…伴随；不带有…
His resignation was unaccompanied by any public statement.
他的辞职没有伴随任何公开声明。
无伴奏演唱
The group's unaccompanied singing filled the hall with rich harmonies.
那个小组的无伴奏演唱让整个大厅回荡着丰富的和声。
无伴奏大提琴（作品）
She has memorized every unaccompanied cello suite by Bach.
她背下了巴赫的全部无伴奏大提琴组曲。
《无人陪伴的未成年人》
This is the title of a 2006 American Christmas comedy film about five children stranded at an airport over the holidays while traveling without adults.
这是2006年美国圣诞喜剧片《无人陪伴的未成年人》的片名，影片讲述五个没有成人陪同的孩子在假期滞留机场的故事。
Use unaccompanied naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
拆开记：un（不）+ accompanied（有伴的）→ 无伴的。想象无人陪伴的儿童独自坐在飞机座位上。
语域：mixed 常见场景：airline and travel notices、legal and official documents、music performance 该词整体中性偏正式；在航空、法律等正式场合较常见，音乐中表示“无伴奏”也是标准用法。指“没有…同时发生/伴随”时多用于书面语，日常口语更常说 without。
与“unaccompanied”真正押韵的词只有“accompanied”（重音及之后发音相同）。其他词如“unaccommodating”“unaccounted”“unaccomplished”“companion”“accompaniment”虽拼写部分相似，但重音或结尾读音不同，注意区分。
Dictionary facts from ECDICT, WIKTIONARY.