> das Mitleid - "mit" means with, and "leid" would be related to the verb "leiden", to suffer. So you'd have "with-suffering", which makes it possible to guess the actual meaning - "compassion"
That is just the same in English. Although you probably need to remember a bit more etymology, and some Latin doesn't hurt, "compassion" is just the same. "com" means with and "passion" in this context also means suffering.