one, 1 / the first in order, foremost / the beginning / the best / a kind of; one of something / (card games) an ace / unity / the bottom string of a shamisen or other Japanese musical instrument

symmetry (correspondence on either side of a dividing line, plane, center or axis)

(linear algebra, mathematics) symmetric matrix

(colloquial) current boyfriend

everything

(slang) Alternative form of 彼氏 (kareshi, “boyfriend”)

everyone, one and all

each person

symmetry

up and down, left and right