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Toefl Words Flash

Prefixes, Roots, and Suffixes               

Click on the letter of the word you want to look up.

               A   B   C   D   E   F      H   I   J   K   L   M

              N         R   S           X    Z

 

PRS              MEANING                            EXAMPLE  WORDS  

A
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a-                   without, not, no                     abiotic, asexual, asymmetry, atrophy, aphasia,
               ab-                 from, away from                     abduction, abstinence, absent, aberrant
abdomin-        abdomen                                abdominal
-able              capable of being,                    flammable, edible, trainable, charitable,
ac-                  sharp                                     acupuncture, acrid, acute, acnode,
-ac                  pertaining to                          hypochondriac, maniac, kleptomaniac, pyromaniac
aca-                thorny, spiny, nettle,              acaleph, acanaceous, acanthus, acanthoid
-acea              class or order name                 Crustacea, Cetacea
-aceous           of the nature of                       herbaceous, sebaceous
acet-               acid, vinegar                           acetic acid, acerbic, acetabulum
-acious            inclined to be                          spacious, fugacious 
acou-              hearing                                    acoumeter, acoustics, acoustician
acr(o)-            high, up, hill, topmost             acrobat, acrodont, acromegaly, acropolis
actin-             light ray, beam                        actiniform, actinic, actinozonal, actinolite
acu-               sharp, needl                             acupuncture, acute, acumen 
-acy                state of being                          lunacy, piracy, dormancy, legacy
ad-                 attached to, near, increase     adhere, adductor, adrenal, addict
-ad                 toward, in the direction of       cephalad, cycad, triad, monad
-ade              result of action                         marmalade, lemonade
aden(o)-        gland                                       adenoid, adenoma, adenectomy
adip(o)-         fat (animal)                             adipose tissue, adipoma, adipocere
adren-           adrenal                                    adrenal gland 
aer(o)-          air, atmosphere, gas                aerobic, aeronautics, aerodynamics,
aesth-           feeling, understanding              aesthete, aesthesiometer
af-                to, towards                               afferent  
-age              act of, state of,                        heritage, breakage, plumage, sewage, blockage,
agglutin-       to glue together                        agglutinate
-agogy           leading                                     pedagogy, demagogy
agora-           open spaces                              agoraphobia
-agra             violent or sharp pain                podagra
agr(o)-           crops, field, soil                       agronomy, agroclimatology, agriculture
-al                 pertaining to, act,                    cranial, skeletal, mental, internal, humoral,
alb(u)-          white                                        albumin, albino, albatross, albedo, 
-algia            pain                                          causalgia, neuralagia, cardialgia, myalgia
alim-            food, to nourish                         alimentary, aliment
-ality            property of, condition of           sexuality, proportionality, reality
allele            of one another                          allele frequency, multiple alleles
allo-             other, different                         alloy, allocate, allogamy
alt(o)-           high                                          altitude, altimeter, altocumulus, altisonant
alter-            another                                    alternate, alter-ego
alveo-           cavity, channel                         alveolus, alveolar cavity, alveolate  
am-              love                                          amorous, amateur 
ambi-            on both sides, around               ambidextrous, ambivalent, ambiguous
ambly-          dull, dim, obtuse, blunt             amblyopia, amblygonite, amblyoform
ambu(l)-       walk                                          ambulatory, ambulate, ambulance, amble,
amphi-          both, on both sides, in               amphibian, amphiblastula, amphitheater,t
ampli-           large, to increase                     ample, amplify, amplitude, amplicative
amyl-            starch                                       amylase, amylopsin
an-                without, not, no, negative        anaerobic, anarchy, aneroid, ananthous,
-an                pertaining to, of, resembling    brachyuran, hydrozoan, American
ana-              up, again, apart, backward       anaphase, analogy, anabolic steroid
-ance            the act of, a thing that             continuance, annoyance, nuisance, dominance,,
andr(o)-        male, masculine, man              androgen, android, androspore, androgny
ane-              without feeling                        anesthetic, anesthesia, anesthesiology
-ane              attribute                                 humane, urbane, mundane, arcane, Germane
angina-         pain, torture                           angina pectoris, anginoid, anginal
angio-           vessel, closed, cased               angioplasty, angiogram, angioblast, angiosperm
anim-           soul, breath, spirit                   animal, animate, animaculum
anis-            unequal                                    anisocytosis, aniseikonia, ansiometric 
ankyl-          crooked, bent, stiff                   ankylosis, ankylosaur, 
annel-          year, ringed, segmented          annual, annelid, anniversary, annuity
-ant              that has, shows or does           merchant, covenant, servant, pleasant
ante-            before, in front of                   antedate, anteflexion, anterior, anteroom,
anter-           before, front, in front             antenatal, antemortem, antechamber, antecedent
anth-            flower                                     antheridium, anther, antherozoid, ananthous
-anthropo-    man, human, referring to man   anthropology, anthropoid, philanthropy
ant(i)-          against                                     antitoxin, antibody, antigen, antidote, antiaircraft
antiq-           ancient                                    antique, antiquary, antiquate, antiquity
aper-            open                                       aperient, apert, aperture, aperitif
api-              top                                         apex, apical, apiculate
apo-             detached, away from, off       apocrine gland, aponeurosis, apogee, apospory
append-        hang on, addition                   appendage, appendix, appendicle  
appet-          to seek                                   appetitive, appetite, appetency
aqua-           water                                      aqueous, aquifer, aquarium, aquaculture
-ar               pertaining to, like, relating to  polar, scholar, cellular, stellar, molecular
arbor-          tree                                         arboreal, arboretum, arborescent
arch-           primitive, original, ancient       archenteron, Archaebacteria, archive 
-arch           ruler, leader                            monarch, tetrarch
-archy         rule, leadership                        gynarchy, anarchy
archeo-        beginning                                archegonium, archeology
-arian          age, sect, occupation              librarian, utilitarian, vegetarian, valedictorian
-arium         place for                                 oceanarium, terrarium, aquarium, sanitarium,
-ard             one who carries an action       drunkard
arterio-        reguarding arteries                 arteriosclerosis
arthr(o)-       joint, jointed                          arthropod, arthritis, arthrology, arthroscope 
articul-         joint                                       articulation, articulate, articulator
-ary              pertaining to, place for,          imaginary, illusionary, aviary, boundary, 
asc-              sac, bag                                  asci, ascomycete, ascocarp, ascospore
-ase             enzyme                                   lipase, sucrase, amylase 
-asis            condition or state of                metastasis, homeostasis
aster-          star like, star                           aster rays, asteroidean, astronomy, astronaut 
-asthenia     loss of strength, weakness        neurasthenia, myasthenia gravis, asthenia gravis
-ate             to cause, like, having, owing    nervate, laminate, acidulate, oxygenate
-ate             chemical compound                 acetate, aluminate, carbonate
-atic            of the kind of                           plasmatic, somatic
-ation          that act of, condition of,         speciation, condensation, precipitation, migration 
atmo-          breath, breathe, vapor           atmosphere, atmometer, atmolysis
-atory          characterized by, of or           circulatory, respiratory, ambulatory,
audi-            hear, hearing                         audio, auditory, audible, auditorium, audiance,
auri-             ear                                        auricle, auricular, aurilave
auto-            self, same                              autonomic, automatic, autosome, autotroph, 
aux-             grow                                      auxin, auxiliary, auxospore
avi(s)-          bird                                        avian, aviary, aviation, aviator
axi-              axis, turn                               axle, axil, axillary, axilla