Longman Dictionary of Contemporary English homepage

Date: 1100-1200
Language: Old Norse
Origin: illr

ill

1 adjective
     
ill1 S3 W3
1 especially British English suffering from a disease or not feeling well [= sick American English]COLLOCATIONS COLLOCATIONS
feel ill become/fall/get ill also be taken ill make somebody ill seriously/critically/gravely ill (=very ill) chronically ill (=always ill) mentally ill terminally ill (=with an illness you will die from)
Bridget can't come - she's ill.
I was feeling ill that day and decided to stay at home.
She was suddenly taken ill at school.
All these diets are making you ill.
ill with
Her husband has been ill with bladder trouble.
A number of these patients are seriously ill.
caring for mentally ill people
a hospice for the terminally ill
see usage note sick1
2 [only before noun] bad or harmful:
Many people consumed the poisoned oil without ill effects.
the neglect and ill treatment of children
He was unable to join the army because of ill health.
3

ill at ease

nervous, uncomfortable, or embarrassed:
He always felt shy and ill at ease at parties.
4

it's an ill wind (that blows nobody any good)

spoken used to say that every problem brings an advantage for someone
ill feeling, ill willWORD CHOICE: WORD CHOICE:

sick, throw up, vomit, ill, not well, unwell
In British English, sick is usually used in the expressions be sick (=have the food in your stomach come up through your mouth) and feel sick (=feel as if this is going to happen) Someone had been sick on the floor. Stop it, I feel sick!In American English, you say that someone throws up. Throw up is also used in British English but is fairly informal.Vomit is a fairly formal way to say 'throw up'. If someone has an illness or disease, you usually say that they are ill in British English, and sick in American English He missed a lot of school when he was ill (BrE)/sick (AmE). In American English, ill suggests you have a more serious disease, from which you may not recover.If someone is slightly ill, you often say in British English that they are not well I won't come out - I'm not very well.Unwell is a more formal word for 'ill' or 'sick'.See also sick

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