Abstruse Meaning, Origin and Abstruse vs Obscure

Abstruse (adjective). difficult to understand, especially because an idea or explanation is complex or specialised.

Example: The manual’s abstruse explanation became clearer when the tutor added a simple diagram.

Pronunciation guide: ab-STROOSS. Capital letters show the stressed syllable.

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What does abstruse mean?

Abstruse is a formal adjective for something hard to understand. It often describes a theory, argument, explanation or technical discussion that requires considerable effort or background knowledge.

It does not automatically mean that the idea is valuable, correct or profound. An abstruse passage might express a difficult but useful idea, or it might be unnecessarily complicated. The word identifies a difficulty in understanding; further context explains the reason.

Abstruse origin and etymology

Abstruse comes from Latin abstrusus, meaning concealed or hidden, associated with the verb abstrudere, to conceal. Think of a meaning that seems hidden from the reader because it is difficult to grasp.

This is a memory aid, not a claim that an author deliberately hides information whenever their writing is abstruse. A specialised explanation can be abstruse to a beginner while being familiar to a specialist.

Abstruse vs obscure

Abstruse focuses on difficulty of understanding. Obscure has several uses: something may be little known, hard to see or unclear in meaning. The two words overlap when you are describing an unclear or difficult passage, but they are not interchangeable in every context.

• “An abstruse theory” is difficult to understand.
• “An obscure author” is an author few people know about. Their writing might be very simple.
• “An obscure explanation” is unclear; it may be difficult because of poor wording rather than technical complexity.

If you mean that a subject demands specialist knowledge, abstruse may be precise. If you mean that few people have heard of it, choose obscure.

Sentence examples, spelling and forms

• The study group spent an hour discussing one abstruse paragraph.
• She turned an abstruse argument into a clear sequence of examples.
• The speaker lost the audience in an abstruse discussion of the model.

Spell the word abstruse, not obstruse. The final sound is like the ending of loose. Related forms include abstrusely, an adverb, and abstruseness, a noun: “The abstruseness of the explanation made the topic harder to teach.”

To practise, name something you found hard to understand and explain what made it difficult. A concrete example will help you remember the word more effectively than simply memorising a synonym.

Practise abstruse: three quick questions

Try each question before opening its answer. If a question asks you to write a sentence, your own correct example is welcome.

Question 1

A writer is unknown to most readers, but writes very clearly. Which fits better: obscure or abstruse?

Question 2

Does an abstruse explanation have to be correct or profound?

Question 3

What connection helps explain the Latin origin of abstruse?

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Compare these words next: Insouciant meaning and practice and Prolific meaning and practice.

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Dictionary reference: Merriam-Webster: Abstruse. The examples and practice questions on this page are written for English Skill Studio.