"Down from" can be translated using the preposition de,and the adverb deorsum can be used for "downwards". Otherwise "down" is not usually expressed in Latin by a separate word, as in English, but rather by adding the prefix de- to the verb. For example, "to boil" is coquo; "to boil down" is decoquo; "to bring" is ferre; "to bring down" is deferre.