Prefixes - "Amount or Position/Direction

hyper-

more, excessive, increased (hypertension - increased blood pressure)
above (hyperflexion - flexion of a limb beyond the normal limit)

hypo-

less, deficient (hypoglycemia - low blood sugar)
below (hypodermic - beneath the skin)

infra-

less than (infrasonic - frequencies that lie below the range of human hearing)
under, below (infrared - portion of the electromagnetic spectrum
with wavelengths between 770 - 1000 nm)

meta-

change (metastasize - to pass into or invade)
behind (metacarpus - the five bones making up the posterior portion
of the hand)

sub-

less than (subnormal - lower or smaller than normal)
under, below (substernal - under the sternum)

super-

excessive, more (supernumeracy - exceeding the normal number)
above (superimpose - place or lay one thing over another)

supra-

excessive, outside (supraliminal - existing above the threshold of consciousness)
beyond (suprarenal - above the kidney)

ultra-

excessive (ultraviolet - electromagnetic rays at a higher frequency
than violet)
beyond (ultrasound - sound having a frequency beyond 30,000 Hz)