Learn on PengiVocabulary from Latin and Greek Roots, Level IXUnit 17 ~ Unit 20

Ch 5.2: Unit 18

In this Grade 6 vocabulary lesson from Vocabulary from Latin and Greek Roots, Level IX (Unit 18), students explore four Latin and Greek roots — COGN, SOPH, NOMEN, and ONYM — to build understanding of words related to knowledge, wisdom, and naming. Students learn terms such as cognitive, cognizant, sophistry, sophomoric, nomenclature, denomination, synonymous, and anonymous by studying their etymology and usage in context. The lesson is part of the Unit 17–20 chapter and reinforces word analysis skills through sentence-completion and fill-in-the-blank exercises.

Section 1

Root: COGN - to know

This group of words comes from the Latin root COGN, meaning 'to know.'

Key Words

WordDefinition
incognito (adj.)Disguised as someone other than oneself
cognitive (adj.)Relating to the processes of thought
cognizant (adj.)Aware

Example Usage

  • Once the chef became cognizant of the food allergy, he prepared a special meal.
  • Playing chess and solving puzzles can help improve your cognitive abilities.

Section 2

Root: SOPH - wise

This group of words is derived from the Greek root SOPH, meaning 'wise.'

Key Words

WordDefinition
sophisticate (n.)One well-traveled and knowledgeable about culture, etiquette, and fashion
sophistry (n.)Use of trickery and false logic in arguments
sophomoric (adj.)Not highly developed; crude

Example Usage

  • The politician's speech was full of clever sophistry, designed to mislead voters without telling outright lies.
  • The principal warned the students that their sophomoric pranks were immature and disruptive.

Section 3

Root: NOMEN - name

This group of words is built on the Latin root NOMEN, meaning 'name.'

Key Words

WordDefinition
nominal (adj.)In name only; not completely true
denomination (n.)Subcategory or subgroup
nomenclature (n.)Official system of naming

Example Usage

  • He was the nominal leader of the project, but his assistant made all the important decisions.
  • The scientific nomenclature for plants helps botanists all over the world communicate clearly.

Section 4

Root: ONYM - name

This group of words originates from the Greek root ONYM, also meaning 'name.'

Key Words

WordDefinition
synonymous (adj.)Meaning the same as
anonymous (adj.)Not revealing one's identity
antonym (n.)A word that means the opposite of another word

Example Usage

  • For many people, the brand name 'Kleenex' has become synonymous with 'tissue'.
  • A helpful note was left on my desk, but the person who wrote it remained anonymous.

Book overview

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Unit 17 ~ Unit 20

  1. Lesson 1

    Ch 5.1: Unit 17

  2. Lesson 2Current

    Ch 5.2: Unit 18

  3. Lesson 3

    Ch 5.3: Unit 19

  4. Lesson 4

    Ch 5.4: Unit 20

Lesson overview

Expand to review the lesson summary and core properties.

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Section 1

Root: COGN - to know

This group of words comes from the Latin root COGN, meaning 'to know.'

Key Words

WordDefinition
incognito (adj.)Disguised as someone other than oneself
cognitive (adj.)Relating to the processes of thought
cognizant (adj.)Aware

Example Usage

  • Once the chef became cognizant of the food allergy, he prepared a special meal.
  • Playing chess and solving puzzles can help improve your cognitive abilities.

Section 2

Root: SOPH - wise

This group of words is derived from the Greek root SOPH, meaning 'wise.'

Key Words

WordDefinition
sophisticate (n.)One well-traveled and knowledgeable about culture, etiquette, and fashion
sophistry (n.)Use of trickery and false logic in arguments
sophomoric (adj.)Not highly developed; crude

Example Usage

  • The politician's speech was full of clever sophistry, designed to mislead voters without telling outright lies.
  • The principal warned the students that their sophomoric pranks were immature and disruptive.

Section 3

Root: NOMEN - name

This group of words is built on the Latin root NOMEN, meaning 'name.'

Key Words

WordDefinition
nominal (adj.)In name only; not completely true
denomination (n.)Subcategory or subgroup
nomenclature (n.)Official system of naming

Example Usage

  • He was the nominal leader of the project, but his assistant made all the important decisions.
  • The scientific nomenclature for plants helps botanists all over the world communicate clearly.

Section 4

Root: ONYM - name

This group of words originates from the Greek root ONYM, also meaning 'name.'

Key Words

WordDefinition
synonymous (adj.)Meaning the same as
anonymous (adj.)Not revealing one's identity
antonym (n.)A word that means the opposite of another word

Example Usage

  • For many people, the brand name 'Kleenex' has become synonymous with 'tissue'.
  • A helpful note was left on my desk, but the person who wrote it remained anonymous.

Book overview

Jump across lessons in the current chapter without opening the full course modal.

Continue this chapter

Unit 17 ~ Unit 20

  1. Lesson 1

    Ch 5.1: Unit 17

  2. Lesson 2Current

    Ch 5.2: Unit 18

  3. Lesson 3

    Ch 5.3: Unit 19

  4. Lesson 4

    Ch 5.4: Unit 20