to know through one's own experience

to have no way of knowing; to be completely ignorant of

to make known

(Classical Japanese, archaic, honorific) to know

God only knows

Alternative form of 一々

Short for 日曜日 (nichiyōbi): Sunday

ordinal day of a month / number of days

sun / day

the sun / sunlight, sunshine / daytime, daylight / a day / time and date / a daily (something done everyday) / the weather / a (usually unfortunate) case, event, situation