a-, an-
Not; without
anti-
Against
brady-
Slow
dia-
Through; complete
echo-
Reflected sound
em-
In
endo-
In; within
epi-
On; over; upon
hyper-
Above; above normal; excessive
hypo-
Below; below normal; deficient
per-
Through
peri-
Around; surrounding
tachy-
Fast
trans-
Across