He was standing on the starting block, waiting for the race to start.

This coastline is protected by wave-dissipating blocks.

His words were filled with deep feelings.

His words left a deep feeling in my heart.

He is occupied with the new project.

His behavior feels uncertain.

I feel uneasy about his attitude, I have no idea what he's thinking.

Kaku is my best friend.

He is proficient in calculating quadrature in astronomy.

He is struggling to understand the ablative case in Latin.