Get a Latin Tutor
Latin word oppidum comes from Proto-Indo-European *h₁epi (On, at, near.)
*h₁epi (Proto-Indo-European)
On, at, near.
ob (Latin)
Against; facing. In the direction of, to, towards. On account of, according to, because of, due to, for (the purpose of).
oppidum (Latin)
Town (esp. of towns other than Rome, which was generally called Urbs).