夏天
xià tiān · HSK 2
summer
☀️ 夏天 = xià (summer) + tiān (sky/day); the summer season
夏 alone means summer; pairing it with 天 (sky/day) gives the full word for the summer season, parallel to 春天 spring, 秋天 autumn, 冬天 winter.
天 — 一 (one/sky) above 大 (big person)
Originally a pictograph of a person (大) with an emphasized head, representing what is above — the sky or heavens. The top stroke evolved into 一, symbolizing the vast expanse overhead. From 'sky' it extended to mean 'day,' 'heaven,' and 'nature.'