Translation guide
The adverb 'soundly' has two main uses: describing deep, uninterrupted sleep, and describing a thorough defeat or beating. This guide covers natural Japanese expressions for each meaning.
Expressing that someone is sleeping deeply, peacefully, or without waking.
The most common and natural way to say 'sleep soundly'. ぐっすり is an onomatopoeia for sleeping deeply and peacefully.
I slept soundly last night.
A slightly more formal or written term meaning 'deep sleep'. Often used in compounds like 熟睡感 (feeling of having slept deeply).
I slept soundly and recovered from fatigue.
Slang for 'sleeping like a log', implying very deep, almost unconscious sleep. Casual and expressive.
I slept so soundly yesterday that I didn't hear anything.
Expressing that someone was defeated decisively, beaten badly, or thrashed.
A strong, idiomatic phrase meaning 'to defeat soundly' or 'to beat mercilessly'. Literally 'to beat until no skin remains'. Used in sports, arguments, etc.
The baby is sleeping soundly.
They soundly defeated the enemy.
Means 'to beat thoroughly' or 'to thrash'. 徹底的に adds the nuance of doing something completely and thoroughly. More casual than 完膚なきまでに.
He soundly beat his opponent.
Literally 'win by a large margin'. Used in sports or competitions to indicate a sound victory.
Our team won soundly.
Slang for 'to lose badly' or 'to be soundly defeated'. From the loser's perspective. ボロ means 'rags' or 'tatters'.
We were soundly beaten in yesterday's game.