Word Building and Collocations: How to Use Prefixes to Guess Meanings - un- re- dis- pre- mis-

How to Use Prefixes to Guess Meanings

Introduction

Mastering prefixes is like having a superpower in English. It can help you understand new words, read faster, and sound more confident when speaking. With prefixes, you can unlock the meanings of thousands of words and become a more fluent English speaker.

WHAT YOU NEED TO KNOW FIRST

Before we dive into prefixes, make sure you're comfortable with basic word recognition and understanding of word families (e.g., -ed, -ing, -s).

CORE CONTENT

Prefixes are like little helpers that attach to the beginning of words to change their meanings. Let's explore five common prefixes: un-, re-, dis-, pre-, and mis-.

Un- (meaning "not" or "opposite")

• Definition: opposite or not
• Example sentences:
  • "I'm unhappy" (not happy)
  • "She's unemployed" (not employed)
• Memory trick: Think of "un" as "not" or "opposite"
• Quiz: Can you think of three words that start with "un-" and mean the opposite of something?

Re- (meaning "again" or "back")

• Definition: again or back
• Example sentences:
  • "I'm going to the store again" (re- means "again")
  • "She's returning the book" (re- means "back")
• Memory trick: Think of "re-" as "again" or "back"
• Quiz: Can you think of three words that start with "re-" and mean "again" or "back"?

Dis- (meaning "not" or "opposite")

• Definition: not or opposite
• Example sentences:
  • "I'm disappointed" (not pleased)
  • "He's disabled" (not able)
• Memory trick: Think of "dis-" as "not" or "opposite"
• Quiz: Can you think of three words that start with "dis-" and mean the opposite of something?

Pre- (meaning "before" or "in front of")

• Definition: before or in front of
• Example sentences:
  • "I'm pre-registered for the course" (before registered)
  • "The pre-game show is on TV" (before the game)
• Memory trick: Think of "pre-" as "before" or "in front of"
• Quiz: Can you think of three words that start with "pre-" and mean "before" or "in front of"?

Mis- (meaning "wrong" or "badly")

• Definition: wrong or badly
• Example sentences:
  • "I'm misinformed" (wrong information)
  • "She's misbehaving" (badly behaving)
• Memory trick: Think of "mis-" as "wrong" or "badly"
• Quiz: Can you think of three words that start with "mis-" and mean "wrong" or "badly"?

WORKED / MODEL EXAMPLES

Let's use the prefix "un-" to create a sentence. If we take the word "happy" and add the prefix "un-", we get "unhappy". This means the opposite of happy.

Model sentence: "I'm unhappy because I lost my favorite book."

Common Mistakes

MISTAKE → WHY IT HAPPENS → CORRECT APPROACH

• MISTAKE: Using "un-" instead of "re-" (e.g., "I'm unregistered" instead of "I'm re-registered")
  • WHY IT HAPPENS: Confusion between similar prefixes
  • CORRECT APPROACH: Double-check the meaning of the prefix and choose the correct one
• MISTAKE: Using "dis-" instead of "mis-" (e.g., "I'm disabled" instead of "I'm misinformed")
  • WHY IT HAPPENS: Similar meanings and sounds
  • CORRECT APPROACH: Pay attention to the context and choose the correct prefix
• MISTAKE: Using "pre-" instead of "re-" (e.g., "I'm pre-registered" instead of "I'm re-registered")
  • WHY IT HAPPENS: Similar meanings and sounds
  • CORRECT APPROACH: Pay attention to the context and choose the correct prefix
• MISTAKE: Not understanding the meaning of a prefix (e.g., "I'm un-registered" instead of "I'm not registered")
  • WHY IT HAPPENS: Lack of understanding of prefix meanings
  • CORRECT APPROACH: Learn the meanings of common prefixes and practice using them

1-Minute Recap

To sum it up, mastering prefixes is like having a superpower in English. By understanding the meanings of "un-", "re-", "dis-", "pre-", and "mis-", you can unlock the meanings of thousands of words and become a more fluent English speaker. Remember to practice using prefixes in context, double-check your answers, and pay attention to the meanings of similar prefixes. With practice and patience, you'll be a prefix master in no time!