decoct

I observe her decocting a medicine for a sick friend, and I ask her, “What medicine is that?”

She had helped to decoct the herbs and roots which Barbara loved to gather, and had herself drank of this devil's broth, as those pleasant, wholesome drinks were now denominated.

Fuller defines a proverb as "much matter decocted into a few words," and a very good definition it is.

And then he proceeded with circumspection  and dignity to demonstrate the process of decocting that mysterious beverage.

In seven, injected ℥xi decoct. quercûs into the peritoneum.