"block up sth" in German to block up sth. etw. verstopfen obstruieren Detailed translations for "block up sth" to block up sth. to block up sth.(also: to block sth., to clog sth., to clog up sth., to obstruct sth.) etw. verstopfen to block up sth.(also: to block sth., to clog sth., to clog up sth., to obstruct sth.) obstruieren{transitive verb}