one day

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

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

(idiomatic) to crack down, to bring down the hammer on

each person

(colloquial) current boyfriend

everything

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

everyone, one and all