That plan is too impractical, it's difficult to implement.

His plan was so unrealistic that no one could believe it.

This painting depicts a surreal landscape.

This design has a unique charm because it is asymmetrical.

He is interested in ichthyological research.

That theory is unscientific and has no evidence at all.

He accidentally held her hand.

I'm troubled by his unproductive attitude.

He was affected by secondary effects.

This is a preliminary plan.