凉爽 (liángshuǎng) is a compound word meaning 'cool and refreshing', describing a pleasant, comfortable coolness, typically for weather, air, or drinks. It combines the senses of 凉 (liáng, 'cool') and 爽 (shuǎng, 'refreshing'), so it emphasizes both coolness and comfort—unlike 凉, which just means cool/cold, and 清凉 (qīngliáng), which is a more literary synonym with a similar meaning.