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Today, I'd like to write about "Quick Tips for Solving TOEIC Vocabulary & Grammar Questions (Parts 5/6)!"
Suffixes that frequently appear in TOEIC vocabulary are extremely important because they help you instantly identify the part of speech and approximate meaning of a word.
Official TOEIC materials and popular vocabulary books (such as the “TOEIC L&R Test Vocabulary” series) consistently emphasize the following suffixes.
So, today, let's learn 5 basic suffixes that form adjectives.
【Suffixes that form adjectives (5)】
-able / -ible
Examples: available, possible, reliable
→ “able to be ~ed”
-al
Examples: financial, cultural, practical
→ “related to”
-ful
Examples: useful, helpful, successful
→ “full of”
-less
Examples: careless, hopeless, wireless
→ “without”
-ive
Examples: effective, active, competitive
→ Showing a tendency or quality
※ In TOEIC, the distinction between "interested" (how people feel) and "interesting" (the nature of things) is extremely frequent.
【Evidence-based learning effect】
Research on vocabulary acquisition shows that learners who understand word formation:
- guess meanings more accurately, and
- achieve significantly higher accuracy in grammar questions.
In TOEIC, the ability to instantly recognize transformations such as:
Verb → Noun → Adjective
has a direct impact on your score.
By organizing suffixes systematically, vocabulary learning shifts from isolated memorization to a connected network.
This greatly improves efficiency and long-term retention.
So, let's learn suffixes little by little!
▼ Want to improve your TOEIC score more efficiently?
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