The case was filed in the C.D. Ill.

The case was filed in the S.D. Ill.

It's an ill wind that blows nobody any good.

The dark clouds and thunder were ill-boding signs of an approaching storm.

I saw many ilang-ilangs blooming in the garden.

He harbored ill-will towards his former colleague.

The Ebbinghaus illusion is a visual perception phenomenon.

The moon illusion is a visual phenomenon where the moon appears larger near the horizon.

The Ponzo illusion is a famous optical illusion that makes two lines of the same length appear different due to the surrounding context.

His ill-doing caused a lot of harm to others.