The prefix that means "backwards" is "retro-".
post-
The prefix that fits the definition of backward or back is "re-".
The prefix that fits the definition of pseudoscience is "pseudo-", which means false or not genuine.
Para
The prefix "retro-" means "backward" or "behind." It is commonly used to show something is old-fashioned or based on previous styles or trends.
The prefix of the word retroperitoneum is "retro-," which means behind, backwards, or on the other side.
The prefix that fits the definition of backward or back is "re-".
The prefix that fits the definition of pseudoscience is "pseudo-", which means false or not genuine.
geo
para
auto
olig
ennea
pseudo
Para
Backwards, or back in time.
You could add the prefix mis- to it to make the word misfits.
Para is the prefix best fitting the definition of beside.