(one) generation; lifetime; age

safety first

a Classical Japanese adjective with ク活用 (ku-katsuyō, “ku-inflection”)

one day, 24 hours / the daytime, the period from dawn until dusk / (figuratively) a short period of time / one day, someday, an unspecified day / the first day of the month

(literally) one side / everywhere, all around, the whole area / one viewpoint, one opinion or way of thinking / the front page of a newspaper

ordinal marker, often with affix 号

first / number one / primary

one day

World War I

once-in-a-lifetime (event)