What Are Noun Suffixes?

A suffix is a group of letters that you add to the end of a word. When you add a noun suffix, it changes the original word into a noun.

This is a powerful way to make your vocabulary bigger. You can take a word you already know, like a verb or an adjective, and turn it into a noun.

Common Suffixes to Form Nouns from Verbs

Many nouns come from verbs. Here are some of the most common suffixes you can add:

• -tion / -sion: These are very common. They often mean 'the act of' or 'the result of' the verb.
  • Verb: to educate → Noun: education
  • Verb: to decide → Noun: decision
  • Verb: to explain → Noun: explanation
• -ment: This suffix often forms nouns that mean 'the action' or 'the result' of the verb.
  • Verb: to develop → Noun: development
  • Verb: to agree → Noun: agreement
  • Verb: to enjoy → Noun: enjoyment
• -ance / -ence: These suffixes also often mean 'the state of' or 'the quality of' the verb's action.
  • Verb: to perform → Noun: performance
  • Verb: to depend → Noun: dependence
  • Verb: to assist → Noun: assistance
• -al: This suffix can form nouns that refer to an action or process.
  • Verb: to arrive → Noun: arrival
  • Verb: to refuse → Noun: refusal

Common Suffixes to Form Nouns from Adjectives

You can also create nouns from adjectives. These nouns often describe a quality or a state.

• -ness: This is a very common suffix. It means 'the state of being' or 'the quality of being' the adjective.
  • Adjective: happy → Noun: happiness
  • Adjective: kind → Noun: kindness
  • Adjective: dark → Noun: darkness
• -ity: This suffix also means 'the quality of being' or 'the state of being' the adjective. Sometimes the spelling of the adjective changes.
  • Adjective: active → Noun: activity
  • Adjective: possible → Noun: possibility
  • Adjective: generous → Noun: generosity
• -y: This suffix can form nouns referring to a quality or condition, often from adjectives ending in -ous または -t.
  • Adjective: difficult → Noun: difficulty
  • Adjective: honest → Noun: honesty

Why Is Word-Building Important for B1 English?

Learning how to build nouns with suffixes is a great way to improve your English at a B1 level.

• Expand Vocabulary: You can quickly understand and use more words. If you know to agree, you can also understand agreement.
• Improve Reading: When you read, you will recognize new words more easily. This helps you understand articles, books, and emails better.
• Better Writing: You can express your ideas with more variety and precision. Instead of always using verbs and adjectives, you can use the noun forms to make your sentences clearer.

例

• The arrival of the train was delayed by an hour.
• We need to find a solution to this problem quickly.
• Her kindness made everyone feel welcome.
• The company announced a new development in technology.
• There was a lot of excitement before the concert.
• He showed great generosity by helping others.

練習

スペイン語話者がよく犯す間違い

Spanish speakers sometimes make mistakes with noun suffixes because the rules are different from Spanish. Here are some common errors:

• Using the verb/adjective instead of the noun:
  ❌ I need to make a decide.
  ✅ I need to make a decision.
• Choosing the wrong suffix: Many suffixes have similar meanings, but they are not interchangeable.
  ❌ The govern-ment made a new inform-ation. (Incorrect suffix for 'information')
  ✅ The government made a new announcement. (Correct suffixes)
• Incorrect spelling changes: Some words change spelling when a suffix is added.
  ❌ He felt much happyness.
  ✅ He felt much happiness. (The 'y' changes to 'i' before '-ness')

よくある質問

What is a suffix in English?

A suffix is a group of letters added to the end of a word. It changes the word's meaning or its grammatical function, for example, turning a verb into a noun like inform ～へ information.

Why should I learn noun suffixes?

Learning noun suffixes helps you expand your vocabulary quickly. It allows you to recognize and form many new words from verbs and adjectives you already know. This improves your reading comprehension and makes your writing more varied and precise.

Are there rules for which suffix to use?

Yes, there are general patterns, but also many exceptions. For example, -tion often follows verbs ending in -ate (e.no-translation>educate → education), while -ment is common with verbs like develop (development). The best way to learn is to notice these patterns and practice using them.

Can one word have more than one noun form?

Sometimes, yes. For example, from the verb to agree, you can form agreement (the state of agreeing). From to inform, you have information (facts) and informant (a person who informs).

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