one day

the daytime, during the day / a half day, half of a day

(rare) the first day of the month

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

(colloquial) to be exhausted (very tired)

hoof of a horse, horse hooves

馬蹄: horse hoof

(historical) Jesuit missionary

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

indicates that something undesirable was done or happened