a spectrum

to divide light into a spectrum

riding separately

to ride separately

立春 (Risshun), the first day of spring in the traditional lunisolar calendar, / 立夏 (Rikka), the first day of summer, / 立秋 (Risshū), the first day of autumn, or / 立冬 (Rittō), the first day of winter

(archaic) any of the four named first days of the lunisolar calendar that mark the division between two seasons / (archaic, especially) the day before Risshun or the beginning of spring

(linguistics) structure, syntax of an expression

division / classification

annex

sworn younger sister