"Miss Granger, surely you understand the repercussions of the Ministry's new Marriage Law? As a young Muggle-born witch of marriageable age, you will be required to marry a pureblood and bear his children. As the suitors for your hand thus far have all been ex- Death Eaters, Professor Snape is your best choice," said Headmaster Dumbledore.
"I have read the law, Headmaster, as it is of the utmost importance to me. I daresay I understand it as well as anyone," replied Hermione Granger.
"Then you understand, Miss Granger, that the alternatives to marrying me, horrific as that may seem, are even worse," snarled Severus Snape.
"I have already remedied the problem, Professors," Hermione responded quietly.
"Miss Granger, that is impossible!" said Dumbledore in frustration, "If there were a way to circumvent the law, surely one of us would have come up with it by now."
"One of the caveats to this law is that the witch must be able to bear children, Sir, and, as I am not, I am exempt."
"Unable to bear children? But why? How?" stammered Dumbledore.
"Impossible," snorted Professor Snape, "You do not have the expertise to brew a potion that would cause permanent infertility, nor would the healers at St. Mungo's oblige you."
"I did not use a potion nor the healers," said Hermione.
"Then how did this come to be?" Dumbledore queried.
"I am a Muggle-born, Sir, and I took advantage of that. I used Adficio Aegrus to cause a cancer to grow rapidly in my reproductive organs. I then went to a Muggle women's clinic complaining of severe cramping. They found the cancer and set up an emergency hysterectomy," explained Hermione, lifting her shirt and pulling down the waistband of her skirt just a bit, to show the long scar on her abdomen.
"You gave yourself a disease? How could you be so stupid! That is an extremely dangerous and dark charm! You could have killed yourself!" screeched Professor Snape.
"But it worked, and as far as I have found, there is no spell to regrow a uterus or ovaries. Once I go to St. Mungo's and have one of the healers confirm that I am sterile, my name will be taken off the Marriage Law list. Problem solved," Hermione countered.
When Hermione left the Headmaster's office, Snape turned to Dumbledore and said, "Well, you'd best hurry and get that law repealed. I knew this wouldn't work." He dropped back into the chair he had been previously occupying.
"Don't worry, Severus, we'll think of something else."
The Latin is:
adficio : to affect, afflict, weaken, sap, exhaust, drain.
aegrus : ill, diseased, unwell.
It is from an online dictionary, so I can not vouch for it. I'm not a Latin scholar, so it is the best I could do.