brady-

Meaning: Slow

example: Bradycardia—a slow heart rate (below 60 beats per minute)

endo-

Meaning: Inside, within

Example: Endocarditis—inflammation of the inner lining of the heart

epi-

Meaning: Upon, over, on top

Example: Epicardium-the outer layer of the heart.

hyper-

meaning: Excessive, above normal

Example: Hyperlipemia-elevated levels of lipids in the blood.

hypo-

Meaning: under or below

Example: orthostatic hypotension-low blood pressure that occurs upon standing up

peri-

Meaning: Around

Example: Pericardium - the membranous sac that contains the heart.

tachy-

Meaning: Fast

Example: Tachicardia - a fast heart rate (over 100 beats per minute).

a-

Meaning: Without

Example: Aphasia - a condition characterized by complete loss of ability to speak or understand language.

an-

Meaning Without, not

Example: Anencephaly - a condition where a major portion of the brain, skull, and scalp is absent.

dys-

Meaning: Difficult, painful, abnormal

Example: Dysphasia - difficulty speaking

hemi-

Meaning: Half

Example: Hemiparesis - weakness on one side of the body.

hyper-

Meaning: Excessive, above normal

Example: Hyperreflexia - 

in-

Meaning: Not, inward

Example: Insomnia - inability to sleep.

inter-

Meaning: Between

Example: Interneuron -a neuron that transmits signals between other neurons.

intra-

Meaning Within, inside

Example: Intracranial—located or occurring within the skull.

pan-

Meaning: All, entire

Example: Panhypopituitarism - decreased function of all pituitary hormones, affecting the nervous system.

para-

Meaning: Beside, abnormal

Example: Paraplegia—paralysis of the lower half of the body.

poly-

Meaning: Many

Example: Polyneuropathy—damage or disease affecting multiple nerves.

post-

Meaning: After

Example: Postictal - the state following a seizure.

pre-

Meaning: Before

Example: Presynaptic -relating to the area before a synapse.

Meaning: Under, below

Example: Subdural - located beneath the dura mater, a membrane surrounding the brain and spinal cord.