WORD STUDY LATIN PREFIX OB-
A root is the basic unit of meaning of a word. A prefix is added to the beginning
of a word to change its meaning or part of speech. Knowing the meanings of word
roots and prefixes can help you figure out the meaning of many new words. Study
the following examples:
PREFIX
ob-
MEANING OF
PREFIX
against
WORDS WITH THE
PREFIX
object (v.)
obstacle (n.)
obdurate (adj.)
MEANINGS OF THE WORDS
WITH THE PREFIX
to oppose or disagree
something standing in the way
unwilling to change one's mind
A. DIRECTIONS: Choose one of the following words to complete each sentence below.
Write the correct word in each space.
objection
obnoxious obstruction obdurate
1. The boy's sister described his constant interrupting as
2. The music critic pointed out that the song was based on an
two decades earlier.
obscure
3. The city council approved the new tax over the
4. The doctor told the patient that the growth had caused an
5. The district attorney was
about his decision to ask the judge to impose
the maximum sentence of the convicted criminal.
one written
of the mayor.
in his throat.
DIRECTIONS: Read each sentence, paying attention to the underlined word. Then,
rewrite the sentence so that it makes sense and still uses the underlined word. If the
sentence is correct as it is, write correct on the line.
1. He said some really obnoxious things about how he respected the
soccer coach.
- The obstacle in the road made it easier to drive down the street.
His comments were intended to obscure what he loved talking about.