_from_ the center.
ef- ef-flux a flowing _out_.

NOTE.--E-, EC-, and EF- are euphonic variations of EX-. When prefixed to
the name of an office, EX- denotes that the person formerly held the office
named: as, _ex_-mayor, the former mayor.

EXTRA- = _beyond_ extra-ordinary _beyond_ ordinary.

IN- (in nouns and in-clude to shut _in_.
il- verbs) il-luminate to throw light _on_.
im- = _in, into, on_ im-port to carry _in_.
ir- ir-rigate to pour water _on_.
en-, em- en-force to force _on_.

NOTE.--The forms IL-, IM-, and IR- are euphonic variations of IN-. The
forms EN- and EM- are of French origin.

IN- (in adjectives in-sane _not_ sane.
i(n) and nouns.) i-gnoble _not_ noble.
il- = _not_ il-legal _not_ legal.
im- im-mature _not_ mature.
ir- ir-regular _not_ regular.

INTER- = _between_ or inter-cede to go _between_.
intel- _among_ intel-ligent choosing _between_.

INTRA- = _inside of_ intra-mural _inside of_ the walls.

INTRO- = _within, into_ intro-duce to lead _into_

JUXTA- = _near_ juxta-position a placing _near_

NON- = _not_ non-combatant _not_ fighting.

NOTE.--A hyphen is generally, though not always, placed between _non-_ and
the root.

OB- ob-ject to throw _against_.
o- _in the way_, o-mit to leave _out_.
oc- = _against_, oc-cur to run _against_;
or _out_ hence, to happen.
of- of-fend to strike _against_.
op- op-pose to put one's self
_against_.

PER- = _through_, per-vade; to pass _through_;
pel- _thoroughly_ per-fect _thoroughly_ made.
pel-lucid _thoroughly_ clear.

NOTE.--Standing alone, PER- signifies _by_: as, _per annum_, _by_ the year.

POST- = _after_, post-script written _after_.
_behind_

PRE- = _before_ pre-cede