Meaning: The cat slept deeply and peacefully throughout the night.
Choice of Words:Soundly means deeply and peacefully.
Alternative Expressions
He slumbered peacefully throughout the night.
Meaning: This conveys a sense of serenity and tranquility during the person's sleep.
Choice of Words:Slumbered is a more poetic way of saying slept. Peacefully emphasizes the undisturbed nature of the sleep. Throughout is similar to all through, indicating the entire duration. Night remains the same.
He rested soundly during the nocturnal hours.
Meaning: This sentence highlights the restful and restorative nature of the person's sleep.
Choice of Words:Rested is a broader term that encompasses sleep and other forms of relaxation. Soundly maintains the idea of deep and uninterrupted sleep. During indicates the time frame, and nocturnal hours is a fancy way of saying night.