TOEICテスト対策 · 2026/03/13

TOEICテスト語彙・文法問題（Part 5/6）をサッと解答できるコツ！名詞を作る接尾辞（suffix）を学ぼう！（英語編）

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Today, I'd like to write about "Quick Tips for Solving TOEIC Vocabulary & Grammar Questions (Parts 5/6)!

In TOEIC Part 5 and Part 6, your ability to quickly identify the part of speech of a word plays a crucial role in your score.

One of the most powerful tools for doing this is understanding suffixes.

When you recognize common suffixes, you can instantly guess:
• the part of speech
• the approximate meaning of the word

Official TOEIC preparation materials and popular vocabulary books (such as the TOEIC L&R vocabulary series) consistently emphasize the importance of word formation.

By learning common suffixes, you can analyze unfamiliar vocabulary much more efficiently during the test.

Instead of memorizing isolated words, you begin to understand how words are systematically connected.

Today, let's learn five essential suffixes that form nouns frequently seen in TOEIC questions.

Suffixes that Form Nouns (5)

-tion / -sion
Examples: information, decision, communication
→ These suffixes turn verbs into nouns.
→ This is one of the most frequent and important patterns in TOEIC vocabulary questions.

-ment
Examples: development, improvement, agreement
→ These nouns often express actions, processes, or results.

-er / -or
Examples: manager, employer, operator
→ These suffixes indicate people, roles, or occupations.

-ness
Examples: happiness, effectiveness, readiness
→ These nouns express states or qualities.

-ity
Examples: responsibility, possibility, quality
→ These suffixes form abstract nouns that describe concepts or conditions.

Evidence-Based Learning Effect

Research on vocabulary acquisition shows that learners who understand word formation patterns:

• guess the meanings of unfamiliar words more accurately
• achieve significantly higher accuracy in grammar questions

In the TOEIC test, the ability to instantly recognize transformations such as:

Verb → Noun → Adjective

has a direct impact on your score.

When suffixes are organized systematically, vocabulary learning shifts from isolated memorization to a connected network of word knowledge.

This approach greatly improves:
• learning efficiency
• long-term retention
• accuracy in TOEIC grammar questions

So, instead of memorizing words randomly, start learning word formation patterns little by little.

Want to Improve Your TOEIC Score More Efficiently?

At English Plus, we help learners develop practical English skills and effective TOEIC strategies through structured lessons and real communication practice.

You can find more practical English learning tips and TOEIC study ideas on our blog:
English learning tips and TOEIC strategies on our blog

If you are interested in improving your English skills or preparing for TOEIC in a more structured way, feel free to learn more about our lessons.
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