5.3 Word Roots, Prefixes, and Suffixes

5.3 Word Roots, Prefixes, and Suffixes

Most of the hard words on a college entrance test are not learned words — they are assembled words. English built its academic vocabulary out of Latin and Greek parts, and the same parts recur relentlessly. Morphology, the study of word structure, lets you take a word you have never seen and recover most of its meaning from its pieces. Filipino students begin with an advantage: hundreds of Spanish loanwords in Filipino carry the same Latin stock — tradisyon, sirkulo, eksperimento, biyahe — so the roots below are often half-familiar already. This section is about a word's raw material; using the surrounding sentence to choose between shades of meaning belongs to section 5.4.

How to decompose a word

An assembled word has up to three slots: prefix + root + suffix. Work them in this order.

1. Strip the suffix. It tells you the part of speech, and sometimes a general flavour (full of, the state of), but rarely the core meaning.
2. Strip the prefix. It supplies polarity (not, against), direction (through, across, under), quantity (one, many, all), or time (before, after, again).
3. Read the root. This carries the meaning.
4. Reassemble literally, then translate the literal gloss into ordinary English.
5. Check the grammar slot. If the sentence needs an adjective and your gloss is a verb, you have mis-split the word.

Decomposition gives you the neighbourhood, not the street address. It reliably eliminates two of four options; it seldom proves one. Use it to cut, then decide.

High-frequency Latin and Greek roots

Affixes worth memorising

Negative and reversal prefixes

• a-, an- (without): amoral, anarchy, anaemic
• in-, im-, il-, ir- (not): inept, impartial, illegible, irreversible
• un-, non- (not): unwarranted, nonpartisan
• dis- (not, apart): disparate, dissuade
• mis- (wrongly, badly): misconstrue, misanthrope
• anti-, contra-, counter- (against): antipathy, contravene, counteract
• de- (down, away, reverse): devalue, deregulate

Quantity prefixes

• mono-, uni- (one): monolithic, unilateral
• bi-, di- (two): bilateral, dichotomy
• poly-, multi- (many): polyglot, multifaceted
• semi-, hemi- (half): semiannual, hemisphere
• omni-, pan- (all): omnipotent, pandemic

Spatial and directional prefixes

• sub- (under): subordinate, submerge
• super-, supra- (above, beyond): superfluous, supranational
• inter- (between): intervene, interdisciplinary
• intra- (within): intramural, intravenous
• trans- (across): transcend, transitory
• circum-, peri- (around): circumvent, perimeter
• hyper- (over, excessive) and hypo- (under, deficient): hyperbole, hypothermia
• ex- (out), ab- (away), ad- (toward): extract, abdicate, adhere

Temporal prefixes

• ante-, pre- (before): antecedent, presage
• post- (after): posthumous, postscript
• re- (again, back): reiterate, retract
• retro- (backward): retrospective, retroactive
• neo- (new) and proto- (first, earliest): neologism, prototype

Suffixes as part-of-speech signals

Building a word family from one root

One root generates a whole family. Here is dict / dic (Latin, "to say"):

                     DICT / DIC  --  to say
                              |
   +-----------+--------------+-------------+--------------+
 pre-dict   contra-dict     e-dict       ver-dict     ab-dic-ate
 say before  speak against  spoken out   truth-said    say away
 = foretell  = oppose       = decree     = judgement   = renounce

   +---------------+----------------+------------------+
 bene-dict-ion   male-dict-ion   juris-dict-ion      dict-ion
  good-saying      bad-saying      law-saying     manner of saying
  = blessing       = curse      = legal authority   = word choice

Learn dict once and nine words arrive with it. Do the same for spec (inspect, conspicuous, circumspect, retrospective, perspective, specious) and for ten / tain (tenacious, retain, sustain, untenable, tenure).

Worked exemplar 1 — decomposing perspicacious

Sentence: "A perspicacious editor caught the error three drafts earlier."

1. Suffix -acious → adjective, "tending to, full of."
2. Prefix per- → "through, thoroughly."
3. Root spic → "to look, see."
4. Literal reassembly: "tending to see through."
5. Ordinary English: keenly perceptive, shrewd.

Against options stubborn / perceptive / careless / long-winded, the literal gloss eliminates three at once.

Worked exemplar 2 — decomposing intractable

Sentence: "The dispute over the boundary proved intractable."

1. Suffix -able → adjective, "able to be."
2. Prefix in- → "not."
3. Root tract → "to pull, drag."
4. Literal: "not able to be pulled" → not able to be handled or steered.
5. Ordinary English: stubborn, unmanageable, resistant to any solution.

Note carefully what morphology did and did not do here. It proved the word is negative and concerns difficulty of handling, which is enough to eliminate easily settled and widely publicised. It could not separate unmanageable from unforgivable; only the sentence can do that.

Traps in morphological analysis

1. Not every in- is negative. Invaluable means too valuable to measure, and inflammable means easily set alight; in both, in- means "into," not "not."
2. Same spelling, different root. Ped- is Latin "foot" in pedal and impede, but Greek "child" in pedagogue and paediatric.
3. Some words only look assembled. Noisome means offensive-smelling and has nothing to do with noise.
4. Suffixes carry grammar, not polarity. -ous is neutral: generous and odious share it.
5. Do not over-literalise. Circumspect means "cautious," not "looking in circles." The literal gloss is a stepping stone, never the final definition.