expression, noun-modifying (irregular)
relieving; refreshing; satisfying
Describes a feeling of relief or satisfaction, often when a frustrating situation is resolved or justice is served. Used prenominally, as in 胸のすく思い.
Seeing his success was truly satisfying.
I heard some refreshing news.
Rarely used kanji form; 空く is less common for this expression.
From 胸 (chest/heart) + の (possessive particle) + すく (to become clear/refreshed). The expression likely derives from the idea of one's chest feeling clear or unblocked.