a-, an-
No or without
bi-
Both or two
Brady-
Slow
Dys-
Painful or difficult
Ec-
Outside
Endo-
Within, in or inner
Epi-
Above
Hemi-
Half
Hyper-
Excessive
Hypo-
Deficient, below normal levels
Inter-
Between
Intra-
Within
Mal-
Bad
Neo-
New
Peri-
Around
Poly-
Many, multiple
Post-
After
Pre-
Before
Sub-
Under
Tachy-
Fast
Trans-
Across
Uni-
One