天下
てんか · tenka · JLPT N1 · noun
universe
🌍 天下 = 天 heaven + 下 below: everything beneath the sky, the whole world
Old Chinese for the whole realm, as in 天下太平 (tiān xià tài píng), 'peace across the land'. Read it as 'under heaven'.
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.'
下 — horizontal line 一 + mark below
下 is an indicative character: a long horizontal line represents a reference level, and a shorter stroke placed beneath it points to the area below. The original meaning 'below, down' comes directly from this spatial diagram, and it later extended to verbs like 'descend' and 'lower'.