A-, an
Without, no, not
Ab-
Away from
Ad-
Near, toward
Af-
Toward
Ana-
Up, apart
Ante-
( direction)
Before, forward, in front of
Anti-
Against
Bi-
Two, both
Brady-
( bradycardia)
Slow
Con-
Together, with
Contra-
Opposite
Dia-
Complete, through
Dys-
(Dyspnea)
Difficult, painful, abnormal, bad
Ec-
Outside, out
Echo-
Using ultrasonic waves
Ef-
Away from
Electro-
Using electricity
End-, endo-
In, inner, within
Epi-
(Epicenter)
Above, upon
Ex-
(Exit)
Out
Extra-
Outside of
Hemi-
(Hemisphere)
Half
Hyper-
( hypertension)
Excessive, too much above
Hypo-
( hypotension)
Deficit, too little, below