Vocabulary and Concept Development

EDI

Standard: 1.4 Students will identify common roots and affixes derived from Greek and Latin and use this knowledge to analyze the meaning of complex words (e.g., international).

Learning Objective

• I will know affixes derived from Greek and Latin and use this knowledge to analyze the meaning of complex words.

Activating Prior Knowledge• Have you heard the word combine?

• The word connect has the prefix con-.

• Can you see the prefix re- in review?

• What does review mean?

Concept Development• Prefix: A word element that is placed at the beginning of the root or word stem.

• Prefix: Part of a word that is placed at the beginning of the root or word stem.

Concept Development• com- or con-: Latin prefix meaning with or together: also used as an intensive.

re- : Latin prefix meaning back or returning to a previous state; again, anew, or over again.

• com- or con-: Prefix from Latin meaning “together” or “with.”

• re- : Prefix from Latin meaning “back” or “again.”

Tell your partner what the prefixes

com- or con- mean.

The prefixes com- and con-

come from Latin meaning “together” or

“with.”

Tell your partner

what the prefix re- means.

The prefix re- comes from Latin and it

means “back” or “again.”

Read the following prefixes:

com-together, withLatin

re -back, againLatin

con-together, withLatin

Importance

• Have you ever been confused about a word and have not been able to figure out its meaning?

• Have you ever had to use knowledge of word meaning to figure out the meaning of a new or difficult word?

Skill Development• Read these words:

relate

communicate

reaction

conjunction

reelect

committee

converse

reflect

and, but, or, …

• Read these definitions / synonyms:

to chose and elect again; to vote into office for another term

a response; the production of a chemical change in substances

a group of people who work together on some matter

to talk together

to make known, to share information together

to bend or throw back light or sound; to think back about, consider carefully

a joining word; the part of speech that joins other words or groups of words; joining together

to have a connection with; to tell

• Match the words with the correct definition or synonym:

relate

communicate

reaction

conjunction

reelect

committee

converse

reflect

to chose and elect again; to vote into office for another term

a response; the production of a chemical change in substances

a group of people who work together on some matter

to talk together

to make known, to share information together

to bend or throw back light or sound; to think back about, consider carefully

a joining word; the part of speech that joins other words or groups of words; joining together

to have a connection with; to tell

Answer these questions:

1. What do the prefixes com- or con- mean?2. What does the prefix semi-mean?3. What does combine mean?4. What does conductor mean?5. What does return mean?6. What does rewrite mean?

Identify the prefixes.

• relate• committee• reflect• communicate• reelect• conjunction • reaction• converse

Guided Practice

Meaning in ContextUse the words in the box to fill in the blanks in the following paragraph.

related Committee reaction conversed reelected

Each member of the Science Fair (1) ________________ had a different idea about how to arrange the displays. Danya, who had attended last year’s fair, (2) _________________ how several projects got broken when people bumped into the tables. Jason and Allison became irritated with each other when they (3) ______________ about where to put the tables. Soon they were having an argument. When Zoe, the chairperson, tried to get them to cooperate, their (4) ________________ was to argue with her, too. Although she finally restored order, Zoe hoped she would not be (5) __________________ to the committee when the science fair came around next year.

Committee

Closure

• The prefixes com- and con- mean –

• The prefixes com- and con- come from Latin meaning “together” or “with.”

• The prefix re- means –• The prefix re- comes from Latin and it means “together” or “with.”

• A Prefix is –

• Prefix : A word element that is placed at the beginning of the root or word stem.

Independent Practice

Match the bolded word with the best synonym:

1. using a conjunction in a sentencea. noun b. joining word c. verb

2. to relate toa. to be done b. connect c. repeat

3. reelect the presidenta. choose again b. side with c. vote

4. communicate informationa. make known b. decide on c. hide

5. to reflect upona. dream b. judge c. consider

ExtensionThe prefix com- / con- (together, with) is sometimes spelled other ways. Look at col- in collect (to gather together). Look at co- in cooperate (to work with). Look at cor- in correspond (to communicate with by letters). All these spellings of the prefix carry the meaning “together, with.”

Sort the following words according to the spelling of the prefix by listing each one under com-, con-, or other.

concert correspondence coordinate collision congruent company companion connection community collage

__________________________________________

__________________________________________

com- con-

________________________________________________________

other