Syllable Rule #1: Every syllable has a vowel. The common vowels are a, e, i, o, and u.

Syllable Rule #2: When the vowel is not at the end of a syllable, it has a short sound. The Vowel-Consonant (VC) and Consonant-Vowel-Consonant (CVC) patterns are called closed syllables. For example, bas-ket is a CVC-CVC word with the short vowels ă and ě.

Syllable Rule #3: When the vowel is at the end of a syllable, it has a long sound. The Consonant-Vowel (CV) and Consonant-Consonant-Vowel (CCV) patterns are called open syllables. For example, be-low is a VC-VC word with the long vowels ā and ō.

Syllable Rule #4: Vowel digraphs are paired vowels that have only one vowel sound. Usually the first vowel indicates the sound of the vowel digraph. For example, in the word boat, the vowel digraph is “oa” and the sound is /ō/. Usually keep vowel digraphs in the same syllable.

Syllable Rule #5: Base words are roots that form complete words. A root is the meaning-based syllable that may or may not connect to prefixes or suffixes. Usually keep the original spelling of the base word when connecting to prefixes and suffixes. For example, kick in kicking.

Syllable Rule #6: Compound words consist of two or three base words (roots that form complete words). Usually keep the original spellings of the base words in compound words. The spelling rules do not change the spelling of the base words. For example, bridesmaid.

Syllable Rule #7: An incomplete root is the meaning-based syllable that connects to prefixes and/or suffixes. Unlike a base word, the incomplete root is not a complete word. Both ending vowels and consonants can change when connecting to other roots and suffixes. Sometimes a vowel or consonant is either added or dropped. For example, vis in visible.

Syllable Rule #8: Keep the silent final “e” and the vowel before in the same syllable. The silent final “e” makes the vowel before a long sound if there is only one consonant in between the vowel and the “e”. For example, basement.

Syllable Rule #9: Vowel diphthongs are paired vowels that have two vowel sounds. For example, “au” in sauces. Like vowel digraphs, they stay in the same syllable.

Syllable Rule #10: Prefixes are meaningful word parts attached to the beginnings of words. More than one prefix can begin a word. For example, mis and under in misunderstand.

Syllable Rule #11: Suffixes are word parts attached to the endings of words. They can add meaning to the word or indicate a part of speech. More than one suffix can end a word. For example, on and al in seasonal.

Syllable Rule #12: Consonant digraphs, such as sh, and consonant blends, such as str, stay in the same syllable. For example, shallow and straighten. The /sh/ consonant digraph frequently changes to another consonant sound between different grammatical forms of the same root. For example, /sh/ to /k/ in musician and magic.

Syllable Rule #13: Keep the r-controlled vowels (ar, er, ir, or, and ur) in the same syllable. For example, er-ror.

Syllable Rule #14: Divide syllables between doubled consonants, for example for-gét-ting, unless the doubled consonant is part of a syllable included in a base word, for example ful-fill-ment.

Syllable Rule #15: Some short vowel sounds change to the soft /uh/ schwa sound with a different grammatical form of the same word. For example, in cónduct and conductor the “o” changes from a short vowel to a schwa.

Syllable Rule #16: Some long vowel sounds change to the soft /uh/ schwa sound with a different grammatical form of the same word. For example, in repeat and repetition the “e” changes from a long vowel to a schwa.

Syllable Rule #17: Some long vowel sounds change to the short vowel sound with a different grammatical form of the same word. For example, in nation and national the “a” changes from a long vowel to a short vowel.

Syllable Rule #18: Some silent consonants are pronounced when connected to different grammatical forms of the same root. For example, numb and number.

Syllable Rule #19: Many Greek and Latin prefixes change their spellings to match the roots to which they attach in order to make pronunciation easier. For example, in and mobile becomes immobile. These “chameleons” can change either their consonant or vowel spellings.

Syllable Rule #20: Many Greek and Latin suffixes are morphemes, which means that the word part is meaningful. For example, viewable. Other suffixes serve as inflections, which means that the suffix helps change the part of speech, but does not add meaning to the word. For example, started.

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In this article, I provide a rationale for teaching the word parts that are keys to academic vocabulary. Additionally, I will share the high utility word parts in priority order that get readers the most “bang for their collective bucks.

The morphological (meaning-based) word parts that form the basis of English academic vocabulary are primarily Greek and Latinates. Prefixes and roots carry the bulk of important word meanings; however, some key suffixes are important, as well. Over 50% of multi-syllabic words beyond the most frequently used 10,000 words contain a Greek or Latin word part. Since Greek and Latinates are so common in our academic language, it makes sense to memorize the highest frequency word parts.

Memorizing high utility Greek and Latin word parts is a very efficient tool to acquire academic vocabulary. Learning the most common word parts unlocks the keys to thousands of academic words which use one or more of those word parts. Even knowing just one word part will provide a clue to meaning of an unknown word. For example, a reader may not understand the meaning of the word bicameral. However, knowing that “bi” means two certainly helps the reader gain a sense of the word, especially when combined with other context clues such as synonyms, antonyms, logic-based, and example clues. For example, in the following sentence the example clue, “checks and balances,” combines with the word part clue, “bi” (meaning two) help the reader problem-solve the meaning of the unknown word: The bicameral legislature provided important checks and balances.

Word part clues are highly memorable because readers have frequent exposure to and practice with the high frequency word parts. Additionally, they are memorable because the simple to understand use of the word part can be applied to more complex usages. For example, “bi” means two in bicycle, just as it means two in bicameral or biped. Analogy is a powerful learning aid and its application in academic vocabulary is of paramount importance.

So here are the highest utility word parts that will assist readers in vocabulary acquisition, especially when paired with wide reading, using refined context clues. The final article in this series, “How to Teach the Most Efficient Word Parts Part V,” will demonstrate how to these these words in a variety of effective instructional strategies.

Most Commonly-Used Prefixes

This list, compiled by White, Sowell, and Yanagihara (The Reading Teacher, 42, p. 306), has the twenty most frequently-used prefixes. In fact these prefixes make up 97% of all prefixed words.

Rank   Prefix            Meaning                                  Rank   Prefix              Meaning

1.         un                     not                                           11.       pre                   before

2.         re                     again                                        12.       inter                  between

3.         in, im, il, ir         not                                           13.       fore                  in front

4.         dis                    away from                                14.       de                    apart from

5.         en, em              in                                              15.       trans                 across

6.         non                   not                                           16.       super                above

7.         in, im                in                                              17.       semi                 half

8.         over                 above                                       18.       anti                   against

9.         mis                   not                                            19.       mid                   middle

10.       sub                   under                                       20.       under                too little

Frequently-Used Roots

Root     Meaning           Origin   Example                      

aud       hear                   Latin     auditorium                   

mis       send                   Latin     mission

astro     star                   Greek   astrology                     

ped      foot                    Latin       pedal

bio       life                      Greek   biology            

phon     sound              Greek   telephone

dict       say                     Latin     predict                         

port      carry                Latin     import

geo       earth                 Greek   geography                   

scrib,    write                 Latin     scribble           

meter    measure         Greek   thermometer                

scrip     write                 Latin     scripture

min       little, small     Latin     minimum                      

spect    see                     Latin     inspect

mit,       send                 Latin     transmit                       

struct    build, form   Latin     instruct

Adapted from Stahl, S.A. and Shiel, T.G., Reading and Writing Quarterly: Overcoming Learning Disabilities, 8, 223-241

Most Commonly-Used Suffixes

Suffix                Meaning

_s, _es             plural or verb tense

_ed                  verb tense

_ing                  verb tense

_ly                    how, when, where, or under what conditions

_er, _or            one who

_er                   comparative adjective

_tion, _ion,       the process or act of

_sion, _ition,

_ation

_able, _ible       able to be

_al, _ial            related to

_y                       consisting of or inclined toward

_ness                 state, quality, condition, degree

This list was adapted from the research compiled by Cooper 2000.

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