(archaic) second-person personal pronoun: you

human / person / people / individual / man / woman / someone

importance

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

single room

anti-Semitism

Alternative form of 一々

one for all, all for one

all at once

once; one time