emit
/i'mit/
Học thuậtThân thiện
Definition
- Verb:
- To send out or give off (something such as light, heat, sound, or gas): To release or discharge a substance or energy into the surrounding environment.
- To utter or express (a sound or words) audibly: To produce vocal sounds or speech.
Usage and Examples
To send out light, heat, or particles:
- The sun emits light and heat.
- The factory's chimney was emitting thick, black smoke.
- A radioactive material can emit dangerous radiation.
To produce sound or voice:
- The device emits a high-pitched warning beep when the battery is low.
- She emitted a sigh of relief when she heard the good news.
Advanced Usage and Nuances
Scientific/Technical Context: Often used in physics, chemistry, and engineering to describe the release of energy or matter.
- LEDs emit light when an electric current passes through them.
- Volcanoes emit large amounts of ash and gases during an eruption.
Formal or Literary Context for Sounds: Can be used for non-verbal sounds made by people or animals, often conveying a specific emotion.
- The wounded animal emitted a low groan.
Variants and Related Words
- Emissive (adj): Having the power to emit radiation or energy.
- The material's emissive properties were tested.
- Emitter (n): A person or thing that emits something.
- The country is one of the largest carbon emitters.
- Emission (n): The act of emitting or something that is emitted.
- The new regulations aim to reduce vehicle emissions.
Synonyms
- Give off: To send out (heat, light, a smell).
- Discharge: To allow (a substance) to flow out from somewhere.
- Release: To allow (something) to move, act, or flow freely.
- Radiate: To emit energy, especially light or heat, in the form of rays.
- Utter: To make a sound with one's voice.
Antonyms
- Absorb: To take in or soak up.
- Contain: To hold or keep within limits.
- Retain: To continue to hold or keep.
Phrasal Verbs / Common Collocations
- Emit from: To be sent out from a source.
- Strange noises were emitting from the old engine.
- Often collocates with nouns for substances or energies: emit light, heat, radiation, sound, gas, smoke, smell, carbon dioxide, a cry, a sigh.
Verb
- express audibly; utter sounds (not necessarily words)
- She let out a big heavy sigh
- He uttered strange sounds that nobody could understand
- give off, send forth, or discharge; as of light, heat, or radiation, vapor, etc.
- The ozone layer blocks some harmful rays which the sun emits
- expel (gases or odors)