His explanation was terse and easy to understand.

I missed school because of the flu.

He is thoroughly implementing safety measures for electrical work to avoid electrocution.

He was electrocuted.

I take cod liver oil every day for nutritional supplementation.

He changed the engine to improve the performance of the car.

My car needs to have its engine replaced.

He is in a sinecure.

This book was editorially supervised by a famous author.

He supervised the editorship of this book.