1
be/look/remain expressionless
常与系动词连用，表示面部或神态不流露情绪；不一定是贬义。
The guard remained expressionless as the crowd shouted.
人群喊叫时，那名警卫始终面无表情。
面无表情的；呆板的
先理解核心含义，再看它在真实句子里的用法。
面无表情的；呆板的
deliberately impassive in manner
The guard remained expressionless as the crowd shouted.
人群喊叫时，那名警卫始终面无表情。
无表情的；没有表现的。
Without expression.
刻意面无表情的
deliberately impassive in manner
My brother told his terrible joke with an expressionless face, and then we both laughed.
我哥哥面无表情地讲了他那个糟糕的笑话，然后我们都笑了。
AI contextual example
The security guard remained expressionless while everyone else was panicking.
其他人都在惊慌失措时，保安仍然面无表情。
AI contextual example
She tried to stay expressionless to keep her surprise a secret.
她尽量保持面无表情，以免让自己的惊喜露馅。
AI contextual example
his face remained expressionless as the verdict was read
宣读判决时,他面无表情。
WordNet
常与系动词连用，表示面部或神态不流露情绪；不一定是贬义。
The guard remained expressionless as the crowd shouted.
人群喊叫时，那名警卫始终面无表情。
keep + 宾语 + expressionless 表示“使……保持面无表情”。
She kept her face expressionless during the entire negotiation.
整个谈判期间，她一直面无表情。
作定语时多修饰 face、look 等与表情有关的名词，译为“面无表情的”比“呆板的”更贴切。
The clerk handed me the form with an expressionless face.
那名职员面无表情地把表格递给我。
Not this
His face expressionless when he heard the news.
Use this
His face was expressionless when he heard the news.
中文可说“他的脸面无表情”，但英语中形容词不能直接作谓语，必须加系动词 be；加上 was 构成完整的系表结构。
Not this
The teacher's expressionless made the students nervous.
Use this
The teacher's expressionless face made the students nervous.
expressionless 是形容词，不能单独作名词充当主语；要在后面加上被修饰的名词 face，构成名词短语作主语。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
面无表情的脸
She kept an expressionless face throughout the meeting.
整个会议期间她一直面无表情。
面无表情的注视
He gave me an expressionless stare.
他面无表情地凝视着我。
毫无表情的眼睛
His expressionless eyes betrayed nothing.
他那毫无表情的眼睛看不出任何情绪。
平板的声音；没有感情的声音
She read the announcement in an expressionless voice.
她用毫无感情的声音宣读了通知。
Use expressionless naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
expression（表情）+less（无）→ 没有表情，即面无表情、呆板的。
语域：neutral 常见场景：小说或叙事文字、日常对话、正式报告 该词比较中性，通常用于书面或正式描写，也可在日常对话中形容面部没有表情；口语中能自然使用，但略带书面语色彩。
这些词都不与 expressionless (/ɪkˌsprɛʃənlɪs/) 完全押韵。expression 和 impression 最接近，共享 /ɛʃən/ 结尾但没有末尾的 /lɪs/；session 也共享 /ɛʃən/。passion 拼写相似但元音是 /æ/ 而非 /ɛ/；restless 和 senseless 只是共享后缀 -less /ləs/。它们是拼写/读音近似词，不是押韵词。
Dictionary facts from ECDICT, WIKTIONARY.