I'll is used in place of I shall or I will
"He spent his ill-gotten gains."
She was a prostitute. She worked in a house of ill-repute. ill repute = bad reputation
She made an ill-informed decision based on incomplete information.
abuse, ill-treat, ill-use, maltreat, manhandle, mishandle, mistreat, misuse.
Ill
"Ill" can be used as an adjective to describe someone who is sick or unwell. It can also be used to describe something that is unfavorable or not good. For example, "She felt ill and stayed home from work" or "The company's ill financial health led to its closure."
i sidled or ill dye bye
According to a dictionary illness means unhealthy, indisposed, or sick. But the archaic (out of use) definitions also means wickedness. So if you are thinking of 'ill' along the lines of 'ill will' then yes; illness might mean 'full of ill.' But usually no.
No ill effects.
The boys father was gravely ill.
My daughter is very ill she has glandular fever.
red and ill