twenty-one; 21

(grammar) Short for 上一段活用 (kami ichidan katsuyō): upper monograde conjugation

viewing and treating as one

regard something or someone as the same

(dated) something that stands out among many other things / (figuratively) a single woman among many men

a linear equation

A Japanese surname.

all day, throughout the day, sunrise to sunset, all around the clock

first storm of spring

a strong sense of impatience, that what one hopes for will take forever before it comes to pass: the sense that time has slowed to a crawl