I think his claim is completely groundless.

The warship was an ancient warship, and its formidable power terrified the enemy.

His car sped away at a seriously fast speed.

His story was as if the monsters were frolicking around.

He is suffering from an incurable disease.

He is known as an astonishing talent in that field.

This snake has lethal poison, so please do not approach it.

He is receiving treatment for folliculitis.

The first month of a season signifies the beginning of a new season.

This summer was oppressively hot, making it difficult to go outside.