Lesson 3: Latin Prefixes 13-18

Ready to become a word detective? These prefixes all mean “not” and are used to create antonyms.

Key Words

• The old manuscript was filled with beautiful drawings, but the handwriting was almost illegible.
• The remote mountain village was inaccessible during the winter months due to heavy snow.
• The decision to sell the family home was irrevocable and saddened everyone.

The prefixes in-, il-, im-, and ir- all mean “not” and are used to negate the root word. The spelling of the prefix often changes to match the first letter of the root word it's attached to. For example, il- is used before l (illogical), im- before m or p (immature, impunity), and ir- before r (irrelevant). These words describe the absence of a quality.

Time to explore the battle of “good” versus “evil” in vocabulary! These prefixes tell you right away if a word has a positive or negative vibe.

Key Words

• The anonymous benefactor donated enough money to build a new library wing.
• He was the sole beneficiary of his grandfather's will, inheriting the family business.
• The villain's malevolent glare revealed his wicked intentions to the hero.

The prefix bene- comes from the Latin word for “good” or “well,” creating words with positive meanings like beneficial (helpful) and benevolent (kind). In contrast, mal- and male- mean “bad” or “evil,” forming words with negative connotations, such as malice (ill will) and maltreat (abuse). These roots are powerful clues to a word's meaning.

Feeling down? So are these words! The prefix “de-” often signals a downward motion, a decline, or taking something away.

Key Words

• After the major recall, the car's value began to depreciate rapidly.
• You must not deviate from the marked trail, or you might get lost in the forest.
• Many college students are still financially dependent on their parents for support.

The prefix de- typically means “down,” “away from,” or “off.” Words in this group often relate to a decline, removal, or a downward movement. For instance, to demolish is to tear down, to be dependent is to “hang down from” another for support, and to despise is to “look down on” someone.

Let's explore the power of “dis-”! This prefix acts like a reverse switch, creating opposites and showing separation.

Key Words

• The constant notifications from his phone can easily distract him from his homework.
• As a journalist, she was known for being dispassionate and objective in all her reports.
• There was a significant discrepancy between the witness's story and the video evidence.

The prefix dis- is a versatile prefix that usually means “opposite of,” “apart,” or “away.” When added to a word, it often reverses its meaning. For example, discontent is the opposite of being content, and to disintegrate is the opposite of being integrated or whole. It can also mean to take something away, like credibility when you discredit someone.

Want to get away from it all? The prefix “se-” means “apart,” and these words are all about separation, solitude, and withdrawal.

Key Words

• To focus on her art, the painter decided to seclude herself in a quiet countryside studio.
• The southern states threatened to secede from the Union, which led to the Civil War.
• In a democracy, peacefully disagreeing with the government is legal, but plotting to overthrow it is sedition.

The prefix se- comes from Latin and means “apart.” Words with this prefix involve separation or moving away from something or someone. To secede is to formally withdraw from a group, to seclude is to keep apart from others, and to segregate is to set a group apart from the main body. Even secure originally meant “apart, or free, from care.”