He was hiding the fact that he was an illegitimate child.

Tormented by guilt, he finally turned himself in to the police.

The seismologist is studying earthquake prediction and disaster prevention.

He is always striving to improve himself in order to maintain his self-respect.

He returned safely and healthily from a long trip.

This radio uses a transistor.

He was admitted to a mental hospital after attempting suicide.

It is important to self-regulate the use of the internet.

He attempted suicide by charcoal burning, but fortunately, he was saved.

Earthquakes, thunder, fires, and fathers are what people fear the most.