kidney
A kidney is one of the two organs in the body that filter waste from the blood to produce urine. They are bean-shaped and located in the middle of the back.
Examples
3 of 5Drinking water is very important for your kidney health.
Drinking water is very important for your kidney health.
The patient is currently awaiting a kidney transplant.
The patient is currently awaiting a kidney transplant.
I've got a bit of a dull ache in my kidney area.
I've got a bit of a dull ache in my kidney area.
Synonyms
Antonyms
Word Family
Memory Tip
Think of a 'kidney bean'—the vegetable is shaped exactly like the organ it is named after.
Quick Quiz
The doctor said my _____ are healthy because I drink enough water.
Correct!
The correct answer is: kidneys
Examples
Drinking water is very important for your kidney health.
everydayDrinking water is very important for your kidney health.
The patient is currently awaiting a kidney transplant.
formalThe patient is currently awaiting a kidney transplant.
I've got a bit of a dull ache in my kidney area.
informalI've got a bit of a dull ache in my kidney area.
The kidneys serve as a primary biological filter for toxins.
academicThe kidneys serve as a primary biological filter for toxins.
The hospital group is investing in new kidney dialysis equipment.
businessThe hospital group is investing in new kidney dialysis equipment.
Synonyms
Antonyms
Word Family
Common Collocations
Common Phrases
kidney punch
a blow to the lower back
of the same kidney
of the same kind or nature
kidney-shaped
having the curved shape of a kidney
Often Confused With
A knee is a joint in your leg, while a kidney is an internal organ.
A kidney bean is a type of vegetable, though it is named after the organ.
Usage Notes
The word is most commonly used in a medical context or when discussing healthy habits. In the plural form 'kidneys', it refers to both organs.
Common Mistakes
Learners sometimes confuse the pronunciation with 'knee' or forget that humans usually have two kidneys, so the plural is often needed.
Memory Tip
Think of a 'kidney bean'—the vegetable is shaped exactly like the organ it is named after.
Word Origin
From Middle English 'kidenere', possibly combining 'kid' (meaning womb or belly) and 'ey' (meaning egg, because of the shape).
Grammar Patterns
Cultural Context
In many cultures, 'steak and kidney pie' is a traditional British dish using the organ as an ingredient.
Quick Quiz
The doctor said my _____ are healthy because I drink enough water.
Correct!
The correct answer is: kidneys
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