Topic summary
Preposition and postposition

Extracted from the Wikipedia article Adposition.
Classification of adpositions
An adposition like the above, which can be either a preposition or a postposition, can be called an ambiposition. However, ambiposition may also be used to refer to a circumposition (see below), or to a word that appears to function as a preposition and postposition simultaneously, as in the Vedic Sanskrit construction (noun-1) ā (noun-2), meaning "from (noun-1) to (noun-2)".