To be quite honest, this came up in my first year first semester Contracts class, and the professor asked the student, "What is the GRAH va men of the case."
The student began, "The gra VAY men of the case is . . ." at which point the prof interrupted him and said, Mr. _____, what is the GRAH va men of the case."
The student replied, "The gra VAY men of the . . . "
"Mr. _______, what is the GRAH va men of the case, and I'd appreciate it if you'd pronounce the word correctly."
"Sir, he replied, I've checked the word and there is no other pronunciation, but the GRAH va men of the case is . . ." and he continued with his analysis.
Three weeks later the professor publicly apologized and commended the student for holding his ground for as long as he could. True story. I saw/heard the interaction personally.