for the purpose of; in the interest of; in order to achieve or preserve

the couple moved to the coast for the sake of her health

let us say, for the sake of argument, that the plotter and the assassin are one and the same person

out of consideration for or in order to help or please someone

I have to make an effort for John's sake

used to express impatience, annoyance, urgency, or desperation

‘Oh, for God's sake!’ snarled Dyson

where did you get it, for heaven's sake?

now, for pity's sake, go to sleep

a Japanese alcoholic drink made from fermented rice, traditionally drunk warm in small porcelain cups

the two spent the evening eating sushi and drinking sake