"swear by sth" in German to swear by sth. auf etw. eingeschworen sein auf etw. schwören Detailed translations for "swear by sth" to swear by sth. to swear by sth.(also: to be committed to sth./to do sth., to be committed to sth.) auf etw. eingeschworen sein to swear by sth. auf etw. schwören