frum
adj.— «“All of a sudden they decided this side of the town is not for them, they needed to go to the other side, because they’re more frum,” she said, using the Yiddish word for religious.» —“Two neighborhoods reveal Orthodox community’s fault lines” by Amy Klein Jewish Journal (Los Angeles, California) Nov. 10, 2006. (source: Double-Tongued Dictionary)
Further reading
Amid court-ordered busing in the 1970s, a middle-school teacher tried to distract her nervous students on the first day of class with this strange assignment: find a monarch caterpillar. The result? A memorable lesson in the miracle of metamorphosis...
You may have a favorite word in English, but what about your favorite in another language? The Spanish term ojalá is especially handy for expressing hopefulness and derives from Arabic for “God willing.” In Trinidad, if you want to ask...
The word is from the German “fromm,” meaning pious. “Frum” is an adjective for Orthodox Jews. A person who is frum is a “frummie.” I’ve heard the latter mostly in reference to women or to groups, not usually to men. It can be a neutral descriptive term or a mildly disdainful one about a person more religious than oneself.