His eyes are a deep blue.

This lake is very deep.

His eyes were filled with deep sorrow.

The road caved in due to the earthquake.

He fell into deep thought.

He fell into a state of lethargy after the exam.

Understanding the transition state of a chemical reaction is important for predicting the progress of the reaction.

The negotiations have fallen into a deadlock.

He has a transmodern way of thinking.

He ended up in a vegetative state after the accident.