infectious
infectious — 形容詞
- infectiouspositive
- more infectiouscomparative
- most infectioussuperlative
1. describes a sickness that can travel from one living thing to another through th
傳染的
疾病可傳播給他人
describes a sickness that can travel from one living thing to another through the air, water, or touch
The flu is highly infectious and spread through the school within a week.
流感具有高度傳染性，在一週內就傳遍了整所學校。
collocation: highly infectious
Doctors warned that the virus remained infectious on metal surfaces for up to three days.
醫生警告說，這種病毒在金屬表面可保持傳染力長達三天。
remain + infectious (linking verb pattern)
Kenji's cough turned out to be an infectious illness, so he stayed home from work.
Kenji 的咳嗽後來證實是傳染性疾病，所以他待在家裡沒去上班。
before noun: infectious illness
The elementary school shut down for two weeks when an infectious case of measles was found in a third-grade classroom.
這所小學關閉了兩週，因為三年級的一間教室裡發現了一起具傳染性的麻疹病例。
before noun: infectious case (specific disease example)
An infectious case of chickenpox at Élise's daycare kept her home for ten days.
Élise 的托兒所出現具傳染性的水痘病例，她在家隔離了十天。
before noun: infectious case (specific disease)
- highly infectious
- infectious disease
- infectious illness
- infectious virus
- infectious strain
- remain infectious
- become infectious
- contagious
more specific — describes diseases spread through direct touch or contact, not air or water
- communicable
more formal — used in official health notices and medical writing
- transmissible
technical — used for diseases that can be passed between organisms, often through blood or fluids
- non-infectious
describes a disease that cannot spread to others
- non-communicable
formal term for diseases like diabetes or heart disease that cannot be passed between people
文法句型
infectious + noun (disease, illness, virus)
be / remain / become infectious
用法筆記
Commonly placed before a noun to name the disease type (infectious disease, infectious virus). Distinguish from contagious: contagious describes diseases passed specifically through touch or close contact, while infectious can also include airborne or waterborne spread.
常見錯誤
2. describes a person or animal who has a sickness that could spread to other peopl
帶傳染病的
帶有可傳播的疾病
describes a person or animal who has a sickness that could spread to other people, animals, or plants around them
Tara was still infectious after her fever faded, so she kept wearing a mask.
Tara 退燒後仍然具有傳染力，所以她繼續戴著口罩。
be + still/no longer + infectious (state of person)
The vet said the puppy was infectious and needed to stay away from other dogs.
獸醫說那隻小狗有傳染性，需要和其他狗隔離。
When Paloma got whooping cough, the doctor said she would be infectious until she took antibiotics for five days.
Paloma 得了百日咳，醫生說她服用抗生素五天期間都具有傳染力。
remain infectious + time period (linking verb pattern)
Amani learned she was no longer infectious and could return to work the next Monday.
Amani 得知自己不再有傳染力，下週一就可以回去上班了。
- still infectious
- no longer infectious
- remain infectious
- become infectious
- highly infectious (person)
- contagious
same meaning for people carrying a disease, but slightly more common in everyday speech
- infected
focuses on having the disease inside the body, not necessarily on the ability to spread it
- carrying
informal — 'carrying a virus' suggests the person may not show symptoms
文法句型
be infectious
remain infectious
become infectious
no longer infectious
用法筆記
Almost always used after a linking verb (be, remain, become, feel) rather than before a noun. Unlike sense 1, you would not say 'an infectious person' to mean a person carrying disease — instead say 'a person who is infectious' or 'an infected person.'
常見錯誤
3. describes an emotion, quality, or activity that quickly spreads among a group of
有感染力的
情緒或特質能快速影響他人
describes an emotion, quality, or activity that quickly spreads among a group of people and makes them feel the same way or want to take part
Manuela's infectious laughter filled the room and soon everyone was smiling.
Manuela 富有感染力的笑聲充滿了整個房間，很快每個人都笑了起來。
infectious + laughter (most common figurative collocation)
The coach's infectious enthusiasm made the whole team train harder than ever.
教練那富有感染力的熱情讓整支隊伍比以往更加努力訓練。
Mira's excitement about the project was infectious, and her colleagues caught the same energy.
Mira 對專案的興奮情緒具有感染力，她的同事們也感受到了同樣的熱情。
be infectious (after linking verb, figurative)
During the tense department meeting, Dario's infectious laughter broke the silence and made the angry manager crack a smile.
在緊張的部門會議中，Dario 富有感染力的笑聲打破了沉默，連生氣的經理都忍不住笑了。
The band played with such infectious energy that even the shyest people started dancing.
樂團演奏時散發出極具感染力的能量，連最害羞的人也開始跳起舞來。
infectious energy — common collocation for music and performances
- infectious laughter
- infectious enthusiasm
- infectious energy
- infectious joy
- infectious smile
- infectious excitement
- contagious
works figuratively too (contagious laughter), but sounds slightly more playful or less formal
- catching
informal — 'His good mood was catching' is friendly and natural in speech
- compelling
stronger — suggests a force that makes people feel they must follow or agree
- dull
describes a mood or atmosphere that does not excite or spread
- unexciting
describes something that fails to spark interest in others
文法句型
infectious + noun (laughter, enthusiasm, joy, energy, excitement)
be infectious
用法筆記
This is the figurative (metaphorical) sense — feelings, not germs, are doing the spreading. Most common with nouns for positive emotions: laughter, enthusiasm, joy, excitement, energy. Cannot be used for negative emotions (sadness, anger) — those are described as contagious in informal use, but not infectious.