In this chemical reaction, hydration plays an important role.

This area is rich in subterranean rivers, which serve as a source of groundwater.

Watching this exciting movie made me feel roused, as if my blood was welling and my flesh was stirring.

He was ostracized by the village.

He is lining his pockets with that project.

He always has an overly optimistic view.

He started studying the day before the exam, which was exactly a case of failing to make a timed preparation.

He was my student, but now he has become so proficient that it can be said 'the student has surpassed his teacher.'

Since he started his new job, he's been lively as if he were a fish back in water.

He absorbs new information like a sponge soaking up water.