За

for, in exchange for, about, (marks what someone is watching or following)

z ɐ → за

preposition Rare #54,183

for, in exchange for

RU: Я купил хлеб за сто рублей.

EN: I bought bread for one hundred rubles.

about, for Used with verbs such as беспокоиться (“to worry”).

RU: Она беспокоится за брата.

EN: She worries about her brother.

(marks what someone is watching or following) Used with verbs such as наблюдать and следить.

RU: Учитель следит за детьми.

EN: The teacher is watching the children.

You didn't ask, “For what?”

— Ночной дозор (2004)

Our only hope left is to die for freedom.

— Цвет шафрана (2006)

Sounds similar to