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infectious

infectious

26 4.0
A feeling or disease that spreads quickly to other people
  • adjective
  • /ɪnˈfɛkʃəs/
translation icon : contagioso
  • She has an infectious laugh that always lifts the mood in the room.
  • infectious disease

The reason it's more infectious is interesting.

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Examples

  • You have a very infectious laugh.

  • The reason it's more infectious is interesting.

  • Then it has this infectious impact on everyone else.

  • But I think what stands out most about him is just his infectious personality.

  • And to make it clear to people, your enthusiasm for science is infectious in the most positive sense of the word.

  • But he stood out because he had the most amazingly infectious smile.

  • Rosemary had been there to advise and suggest throughout, and her enthusiasm had been infectious.

    Fiction book (1999)
  • Andrew's excitement was infectious as we chugged toward the island.

    Fiction book (1993)
  • Your positivity is infectious.

  • Butov looks back on an era dominated by the infectious excitement of new freedoms with a sympathetic, yet concerned, eye.

    Fiction book (2002)

Synonyms

contagious
vsinfectious
108 3.1

Something that spreads from one person to another, like a disease or feeling

also covers emotions and influence in the same way as disease
highly contagious
vsinfectious
9 3.4

A disease that spreads very easily between people

describes passing easily without stressing that extreme level
communicable
vsinfectious
  • Specialized
9 4.2

Able to pass from one person to another and cause sickness

includes social influence and emotion as possible ways of sharing
transmissible
vsinfectious
  • Specialized
3 5.3

Able to pass from one person or animal to another by infection

adds social or emotional spread as well as biological passing
transmittable
vsinfectious
2 3.9

Able to pass from one person or animal to another

also applies to feelings and influence, not only physical movement
infective
vsinfectious
  • Specialized
1 7.4

Able to make people sick and spread disease

focuses on causing sickness rather than on social or emotional spread
catching
vsinfectious
3.5

Able to spread from one person to another, like a cold

also covers emotions and influence as well as disease
spreadable
vsinfectious
3.9

Able to pass from one person to another

also refers to emotional or idea based spreading, not only physical spread
contractable
vsinfectious
  • Specialized
7.1

Able to be caught from another person and make you sick

is broader, also used for emotions and influence not only disease
contractible
vsinfectious
  • Specialized
6.5

Easily caught and spread among people or animals

focuses on being caught rather than on how it spreads socially
catchable
vsinfectious
4.7

Easy to get, especially an illness that spreads between people

is used more generally, including emotional or social passing
highly infective
vsinfectious
  • Specialized
5.6

Very likely to make people sick

focuses on agent power, while the other term highlights passing or social influence

Antonyms

noninfectious
  • Specialized
1 4.6

Not able to spread disease between people

Not able to spread from one person to another

Compounds

infectious disease
  • Specialized
37 3.0

A disease caused by germs that can spread from person to person

infectious agent
  • Specialized
5 4.2

A tiny living thing like a virus or bacterium that can make people and animals sick

Strong, happy feeling that makes other people excited

3.8

A short, often mild liver illness caused by a virus and spread by dirty food or water

A strong happiness that spreads to others and makes them smile

A happy sound that makes other people laugh

4.2

A sickness caused by a virus that gives fever, sore throat, and swollen glands

Swelling of many nerves outside the brain and spinal cord that causes pain, weakness and sometimes paralysis

How Infectious

contagious
108 3.1
infectious
26 4.0
transmissible
  • Specialized
3 5.3
noninfectious
  • Specialized
1 4.6

Surface Forms

infectious positive

Morphology

infectious = infect (semi-transparent) = infect + ious

The adjective is formed from 'infect' + '-ious', but the extension to emotions or behaviours is figurative and may not be automatically inferred by all learners.

Etymology

The word infectious also comes from Latin inficere ('to put into' or 'to dye'), and a helpful image is a feeling that 'stains' people the same way colour stains cloth. That's why an infectious laugh or mood 'spreads' quickly from person to person.