filter
Pronunciation
Noun
A2 Elementary
Quick answer
A device or material that removes unwanted particles or substances as a liquid or gas passes through it.
Test yourself
Which word fits the gap? "Remember to change the air _____ in the furnace every few months."
Answer: filter
In your own words, what does "filter" mean?
A device or material that removes unwanted particles or substances as a liquid or gas passes through it.
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