1.
three days
A duration of three days.
三日 has two meanings: a duration of three days, and the 3rd day of the month. Context usually makes the meaning clear.
DAYS OF THE MONTH (1-10):
COMMON EXPRESSIONS:
IDIOM:
三日坊主 literally "three-day monk" means someone who gives up easily or lacks perseverance. Used when someone starts something but quickly abandons it.