Daf Yomi- learning a page of the Talmud every day
Dan L'Chaf Zechus- Hebrew, to Judge on the side of merit, to judge every person favorably until you know all the details
Daven- to pray
Davening- either the act of praying, or the prayer service
Dayenu - a song that is part of the Passover seder; literally, "it would have been enough for us"
Derech – literally means “the way”, can also refer to the stream of orthodoxy one follows
Derech eretz - good manners; courtesy
D'var Torah - commentary on or explication of Jewish law, tradition, or beliefs