De, signifies down, as, deject, or “throw down.”
Di, dis, asunder, as distract, or “draw asunder.”
E, ex, out of, as, egress, or “going out,” eject, or “throw out,” exclude, or “shut out.”
Extra, beyond, as, extraordinary, or “beyond the ordinary or usual course.”
In, before an adjective, like un, denotes privation, as, active, inactive, or “not active;” before a verb, it has its simple meaning.
Inter, between, as, intervene, or “come between,” interpose, or “put between.”
Intro, to within, as, introduce, or “lead in.”
Ob, denotes opposition, as, obstacle, that is, “something standing in opposition,” “an impediment.”
Per, through, or thoroughly, as, perfect, or “thoroughly done,” to perforate, or “to bore through.”