Are there any languages (natural or constructed) where the same word can be used as a preposition or a postposition to provide different meanings?
Here's a made-up example of what I mean (based on the English words 'to' and 'from') ...
trom the store - to the store
the store trom - from the store
tromo - under/over
tromf - behind/in front of
trome - west of/east of
trom the store tromf - to the store's front
the store trome trom - from the store's eastern side