Abstruse vs. Obtuse: Meaning and Examples
Abstruse vs. Obtuse
Both words relate to understanding, but from opposite directions. Abstruse describes the material. Obtuse describes the person trying to understand it.
What Does Abstruse Mean?
Abstruse means difficult to understand, obscure, or hard to penetrate intellectually.
- The philosopher's abstruse arguments confused even his colleagues.
- The manual was filled with abstruse technical jargon.
- Quantum mechanics can seem abstruse to newcomers.
Abstruse applies to ideas, texts, subjects, and explanations that are genuinely hard to grasp.
What Does Obtuse Mean?
Obtuse has two main meanings:
1. Slow to understand or insensitive
- He was being deliberately obtuse about the problem.
- Stop being obtuse and listen to what I'm saying.
- She found his obtuse response frustrating.
2. In geometry, an angle greater than 90 degrees but less than 180 degrees
- A triangle with one obtuse angle is called an obtuse triangle.
- The angle measured 120 degrees, making it obtuse.
When describing people, obtuse is always negative. It implies someone is being dull, thick, or willfully refusing to understand.
The Key Difference
- Abstruse = the subject is hard to understand (the material is complex)
- Obtuse = the person is slow to understand (the person is dull)
An abstruse lecture is genuinely difficult. An obtuse listener fails to grasp even straightforward points.
Examples Side by Side
| Abstruse | Obtuse | |---|---| | The paper's abstruse conclusions baffled reviewers. | He's not stupid, just being obtuse right now. | | Her abstruse writing style limits her audience. | Don't be so obtuse; the answer is obvious. | | Abstruse topics require patient explanation. | His obtuse remarks showed he hadn't been listening. |
Usage Notes
Abstruse is a relatively formal word. In casual conversation, people are more likely to say "complicated," "confusing," or "over my head."
Obtuse is more widely known, partly because of its geometry meaning. When used to describe a person, it's a pointed insult, suggesting they're either genuinely slow or deliberately refusing to understand.
Common Mistakes
The main error is using "obtuse" when you mean "abstruse." Saying "the textbook is obtuse" technically means the textbook is slow to understand things, which doesn't make sense. The correct phrasing would be "the textbook is abstruse" (hard to understand).
Some writers also confuse "abstruse" with "abstract." While both relate to things that are hard to pin down, abstract means theoretical or not concrete, while abstruse means difficult to comprehend.
Memory Tip
- Abstruse starts with "ab-," like "abnormal." The difficulty is in the material; something is abnormally hard to understand.
- Obtuse starts like "oblivious." The person is oblivious to the point.
Summary
Abstruse describes complex, hard-to-understand subject matter. Obtuse describes a person who is slow or unwilling to understand. Direct your criticism at the right target: the material or the person.
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