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contagious + noun
The contagious disease spread quickly.
这种传染病传播得很快。
传染性的；（人）带传染病的
先理解核心含义，再看它在真实句子里的用法。
传染性的；（人）带传染病的
Of a disease or person, able to be passed on to someone else through contact.
The contagious disease spread quickly.
这种传染病传播得很快。
容易传染给他人的。
Easily transmitted to others.
容易从一个人传播到另一个人的
easily diffused or spread as from one person to another
容易传播给别人的。
Easily passed on to others.
(疾病)能够通过感染传播的
(of disease) capable of being transmitted by infection
The cold virus is contagious and can spread through coughing.
感冒病毒具有传染性，可以通过咳嗽传播。
AI contextual example
Her positive attitude is contagious, making everyone around her feel happier.
她的积极态度很有感染力，让周围每个人都感到更快乐。
AI contextual example
Yawning can be contagious; when one person yawns, others often follow.
打哈欠会传染；一个人打哈欠时，其他人常常也会跟着打。
AI contextual example
a contagious grin
有感染力的笑容
WordNet
The contagious disease spread quickly.
这种传染病传播得很快。
用于形容情绪或行为容易感染他人。
Her laughter is contagious.
她的笑声很有感染力。
常见副词有 highly, extremely 等。
The virus is highly contagious.
这种病毒传染性很强。
Not this
You should avoid close contact with a contagious.
Use this
You should avoid close contact with a contagious person.
在英语中，contagious 是形容词，不能直接用作名词。应加上 person 或 disease 等名词。
Not this
He is infectious, so stay away.
Use this
He is contagious, so stay away.
用于描述人时，contagious 表示‘具有传染性的’，而 infectious 更常指疾病本身或通过空气传播。表达‘人有传染性’通常用 contagious。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
传染病
Measles is a highly contagious disease.
麻疹是一种高度传染性的疾病。
有感染力的笑声
Her contagious laughter filled the room.
她那有感染力的笑声充满了整个房间。
有感染力的热情
His contagious enthusiasm motivated the whole team.
他那富有感染力的热情激励了整个团队。
高度传染性的
The virus is highly contagious and spreads quickly.
这种病毒传染性很强，传播很快。
笑声是会传染的
His laughter is contagious; soon everyone in the room was giggling.
他的笑声很有感染力，很快整个房间的人都咯咯笑了起来。
有感染力的笑容
She has a contagious smile that lights up the room.
她的笑容很有感染力，照亮了整个房间。
有感染力的热情
Her enthusiasm for the project was contagious, and the whole team worked harder.
她对项目的热情很有感染力，整个团队都更加努力了。
没有什么比热情更具感染力。
The famous line "Nothing is so contagious as enthusiasm" — often attributed to Samuel Taylor Coleridge — reminds us that our feelings easily spread to others.
这句名言“没有什么比热情更具感染力”常被认为是塞缪尔·泰勒·柯勒律治所说，它提醒我们，情感很容易传染给别人。
勇气是会传染的。当一个勇敢的人挺身而出时，其他人的脊梁往往也会挺直。
Billy Graham's famous observation that courage is contagious encourages people to be brave in the face of injustice.
比利·格雷厄姆的名言“勇气是会传染的”鼓励人们在面对不义时勇敢起来。
Use contagious naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想：里面藏着 tag（标签），病菌贴上标签就相互传染。
语域：mixed 常见场景：医患交流与健康科普、日常聊天、描述行为或情绪的蔓延 contagious 通常表示‘（疾病）会传染的’，在医疗讨论、健康科普和日常聊天中都比较常见；日常口语里还多用于引申义‘有感染力的’（如笑声、热情）。它的语体比较中性，正式与非正式场合都可使用，具体含义和搭配随语境变化。
通常作表语或定语，后接介词to表示‘对…有传染性’
Dictionary facts from ECDICT, WIKTIONARY.