The ill-formed puzzle was impossible to solve.

He ill-judgedly invested all his savings in a risky business venture.

The ill-affected employees expressed their dissatisfaction with the company's management.

He was surrounded by ill-wishers who wanted to see him fail.

His ill-judged decision cost him his job.

The ill-sorted colors of her outfit clashed with each other.

The ill-assorted couple struggled to find common ground.

She falls ill every winter.

She is falling ill and needs to rest.

She fell ill and had to stay home from work.