GRE Words for Unclear and Vague
These 12 GRE words all share the meaning of unclear and vague. Studying them as one cluster is far more efficient than learning each in isolation, because the GRE tests words by how they relate to each other. Each entry below links to a full definition page with example sentences and memory hooks.
Why this cluster matters
On Sentence Equivalence you must choose two words that give the sentence the same meaning. That means the answer is almost always a synonym pair pulled from a cluster like this one. Watch the connotation tone on each word: a positive and a negative word rarely form a correct pair, even when their definitions look close.
The 12 words
Difficult to understand; obscure
Open to more than one interpretation; unclear
Understood by few; mysterious or secret
Open to more than one interpretation; ambiguous
Intended for or likely to be understood by only a small number of people with specialized knowledge
Vague, indistinct, or confused; lacking clarity
Not exactly known, established, or defined; vague
Dark and gloomy; not clear or transparent; unclear
In the form of a cloud; vague or ill-defined
Not discovered or known about; uncertain
Not able to be seen through; not transparent; difficult to understand
Little known; abstruse; dealing with very profound, difficult, or specialized subject matter
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