An
Without (anorexia)
Ab
From, off, away from (abnormal)
Ambi
Both (ambidextrous)
Ana
Excessive (anadipsia)
Anti
Against (antiseptic)
Bi
Twice or two (bilateral)
Brady
Slow (bradycardia)
Co
Together (cohabitation)
Con
Together (concurrent)
Contra
Against, opposite (contraindication)
Counter
Against (counteract)
Crypto
Hidden or undescended (cryptorchid)
De
Remove from (denude)
Dis
Denoting separation (dislocation)
Dys
Denoting pain, difficulty (dysuria)
En
Inside (encephalomyelitis)
Endo
Within, inward (endotoxin)
Epi
Upon, outer (epidermis)
Eu
Normal, (eupeptic)
Ex
Outside, from (exudate)
Hemo
Pertaining to blood (hemoglobin)
Hetero
Unlike (heterozygote)
Homo
Likeness (homozygote)
Hydro
Water (hydrocephalic)
Hyper
Above, over, excessive (hyperesthesia)
Hypo
Less, below, insufficient (hypo-cephalic)
Im
Not (imperforate)
In
Not (infertile)
Inter
Between (intercellular)
Intra
Inside, within, into (intravenous)
Intro
Into, within (intro-gastric)
Macro
Large, able to see to see with the naked eye (macroparasite)
Micro
Small, microscopic
Meta
Transformation (metamorphosis)
Multi
Many
Neo
Young, new, recent
Peri
Around (pericardium)
Photo
Pertaining to light
Poly
Many
Post
Behind or after
Pre
Before
Pseudo
False (pseudohermaphrodite)
Pyo
Pus, purulent (pyometra)
Thermo
Heat
Trans
Across, through (transfusion)
A
Without or lack of (afebrile)