binnen

From Middle Low German binnen (“within”), ultimately from Proto-Germanic *bi- (“by, at”) + *innan << *in (“in”). The form is also Central German in Middle High German binnen (compare Luxembourgish bannen). It is originally an adverb meaning “within, inside” chiefly in local sense, equivalent to German innen. Binnen was adopted in modern standard German as a temporal preposition, while the prefix binnen- takes on the local sense of the word. Cognate with Dutch binnen.