This meaning shows when a person is sick or does not feel well. People say this when their body hurts or they have a health problem.
I feel ill today and need rest.
She is ill and cannot go to school.
This describes something that is bad or causes harm. It can mean something is wrong or unwanted, like bad plans or bad weather.
He has an ill plan to cheat others.
The ill weather ruined our trip today.
This old or literary use means to feel angry or upset with someone. It is not common in daily talk but appears in books or poetry.
He was ill with his friend after the fight.
She felt ill toward him for many days.
Rare verb meaning to cause harm or damage to someone or something. It is old-fashioned and not used often in modern English.
Lying ills the trust in a close friendship.
The cold wind illed the plants last winter.
Used as a noun, 'ills' refers to troubles or bad things that cause suffering or problems. It is often used in plural form.
The town faced many ills after the storm.
We should fix the ills of the system fast.
In some phrases and idioms, 'ill' means badly or not well. These are common fixed expressions used in everyday English.
She felt ill at ease in the new school.
He was ill prepared for the test today.
