semi-, spiro-, sub-, super-, syn-, sym- etc
Sino-
"Im" is a common prefix in itself, you don't add a prefix to a prefix.
Portable!
Anterior ,
Superdupercalafragilisticexpialadoshious.
Aftershock Aftershock
Dodecagon
consequence
conifer
repair
"Second-hand" is a word that starts with the prefix "se-".
loq-