Combined from One [一] + Two [二] + Big / Great [大] to compose 天: represents "heavens".
heavenly, imperial
heaven and earth, the universe, nature, top and bottom, realm, sphere, world
rainy weather
Emperor of Japan
fine weather
a priori, inborn, innate, inherent, congenital, hereditary
paradise, heaven, Kingdom of Heaven
genius, prodigy, natural gift
natural calamity, disaster
ceiling, ceiling price
heavenly body
Emperor of Japan
weather
nature, spontaneity
weather forecast
weather