What is ""θετός αδερφός"" in American English and how to say it?

Greek

θετός αδερφός

θετός αδερφός-foster brother.svg
American English

foster brother

Learn the word in this minigame:

Example sentences

American EnglishShe grew up in temporary homes through foster care.

How ""θετός αδερφός"" is said across the globe.