凉快
liáng kuai · HSK 2
pleasantly cool
❄️ 凉 = cool + 快 = pleasant/quick — together: pleasantly cool
凉 means cool/cold (water radical 氵 + 京 jīng for sound). 快 means fast or pleasant. The compound shifts 快 toward its 'pleasant' sense, giving a refreshing, comfortable coolness — like stepping into shade on a hot day.
凉 — ice radical 冫 + 京 (capital)
A semantic-phonetic compound: 冫 (ice) gives the meaning 'cool/cold,' while 京 supplies the sound. Originally written 涼 with the water radical 氵, suggesting cool water; the simplified form 凉 swaps in 冫 to emphasize coldness. The meaning extended from 'cool' to 'chilly' and figuratively 'desolate.'
快 — heart radical 忄 + 夬 (phonetic)
快 is a semantic-phonetic compound. The heart radical 忄 carries the meaning, since the original sense referred to a feeling of pleasure or delight. The right side 夬 supplies the sound. The meaning later extended from 'pleased' to 'quick, fast', the dominant modern sense.