Prefixes: Part 1

Difficulty Level: ★ ★ ★ ★ ★

Prefixes are the beginning syllables, or part of a word that comes before the main word (root of the word).

Most Common Prefixes:

dis, un, im, non, in, and ir are the most common prefixes ad they simply mean "not", or the opposite of the root words meaning.

Here are some examples:

1.) She always disapproves of my decisions.

2.) The timeframe for completing the project is unreasonable.

3.) Working on Saturdays is inconvenient for me.

4.) Sometimes my girlfriend gets too emotional, and acts irrational.

Other Common Prefixes Include:

Over: (too much) I overslept.

Mis: (badly or wrongly) She is always misbehaving.

Co: (together) We are the co-owners of this company.

De: (do the opposite) The stock will likely be devalued in the upcoming months.

Under: (not enough) The company is undervalued.


Get in the habit of learning the proper prefix for commonly used words. It's the easiest way to increase your vocabulary and advance your English level. This is an easy way to step out of baby English.


What is the best-suited prefix for each of the sentences below?

  • 1.) I have to check with upper management, but I think they will ___agree with your ideas.
  • 2.) I think she is ___attainable. You might have to lower your standards.
  • 3.) She is very pretty but a little bit ___ mature for her age.
  • 4.) Our current project was ___ managed because we didn't have the capital to fund all the expenses.
  • 5.) Some of the components of our machinery at Hynix are very expensive. They have parts that are ___replaceable.
  • 6.) My date with her was truly ___forgettable.
  • 7.) The latest reports from our third quarter sales are __fortunate.
  • 8.) The ___authors of the tutorial promise to write more works together in the upcoming months.
  • 9.) I'd love to ___connect with my old classmates from high school.
  • 10.) She tends to ____react when I make the littlest of mistakes.


Match the words from column 1 with the best-suited answer from column 2.

Column 1 Column 2
1.) dis a.) polite
2.) im b.) view
3.) in c.) mystify
4.) mis d.) decided
5.) pre e.) pronounce
6.) re f.) habitate
7.) un g.) definite
8.) over h.) marry
9.) co i.) trust
10.) de j.) think


Respond to the questions using the correct prefix to give the opposite meaning. For example: "Is it convenient for you to work evenings?" "Actually, it's inconvenient for me to work evenings."

1.) "Do you like drinking Soju?"

2.) "Do you think our stock will perform better or worse next quarter?"

3.) Were you informed about the 7:00 pm meeting?

4.) Should I connect the power to the machine or not?

5.) Was the flight to China comfortable?

6.) Is the system functioning properly?

7.) Is the device compatible with our current software?

8.) Do you think she is honest?

Daily Expressions, Phrasal Verbs & Idioms:

1.) "(getting) out of line": When someone is behaving inappropriately. We use this phrase to describe when someone’s actions are rude.

"He was shouting, pushing people and getting out of line so the shop keeper called the police before the situation escalated."

 a collage of pictures related to South Korea.