It is inseparable. Here is a list of all inseparable prefixes in German: be, ver, emp, ent, er, ge, miss, and zer All of the inseparable prefixes do not resemble words like the separable ones do. like any other prefix, they modify the meaning or nuance of the word they are attached to. For example: the prefix "zer," I like to remember as "to pieces." Let's look at the verb "brechen" meaning "to break," whereas "zerbrechen" means "to shatter." "stören" means "to disturb" and "zerstören" means "to destroy"