expression, noun
low spirits; depressed heart
Describes a state of feeling down or heavy-hearted; often used in literary or emotional contexts.
彼は沈んだ心で一日を過ごした。
He spent the day with a heavy heart.
沈んだ心を抱えて、彼女は窓の外を見つめていた。
With a depressed heart, she stared out the window.
Compound of 沈んだ (past tense of 沈む 'to sink') and 心 ('heart, mind'), literally 'sunken heart'. The expression is straightforward and its origin is transparent.