Meaning : (`ill' is often used as a combining form) in a poor or improper or unsatisfactory manner. Not well.
Example :
He was ill prepared.
It ill befits a man to betray old friends.
The car runs badly.
He performed badly on the exam.
The team played poorly.
Ill-fitting clothes.
An ill-conceived plan.
(often used as a combining form) in a good or proper or satisfactory manner or to a high standard (`good' is a nonstandard dialectal variant for `well').
The children behaved well.Meaning : Somewhat ill or prone to illness.
Example :
My poor ailing grandmother.
Feeling a bit indisposed today.
You look a little peaked.
Feeling poorly.
A sickly child.
Is unwell and can't come to work.
Synonyms : ailing, indisposed, peaked, seedy, sickly, under the weather, unwell