Greetings:
Tonight in shul we had quite a discussion on Rashi (bottom of 27A):
issur adam btzaros...elah MENACHRI
What is MENACHRI and would you please explain that RASHI??
Best wishes,
Shmuel Weinstein
"Nochri" in this context means a person who is not a brother of the Yavam (and consequently his wife cannot become an "Eshes Ach" to the Yavam).
The word "Nochri" is commonly used in Yevamos in this context, see Mishnayos on Daf 30a.
Be well, Mordecai