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GRE vocabulary

penumbra

nounHigh-frequency wordMore P words

a partial shadow at the edge of a fully shaded area, or a less clear or definite part of something

Word origin: From Latin paene (almost) and umbra (shadow).

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In a sentence

Penumbra in a sentence

Here are example sentences showing penumbra in a sentence.

The legislation existed in the penumbra of constitutional law, neither clearly permitted nor forbidden.

The court located the right within a penumbra of guarantees implied, though not stated, by the constitution.

Synonyms
shadowmarginfringe
Antonyms
centercoreclarity

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Verbal · Sentence Equivalence

The professor's lectures were notoriously blank; students often left more puzzled than when they had arrived, unable to follow his tangled chains of reasoning.

Select the two answers that give the sentence the same meaning. 0 of 2 selected.

Usage & nuance

Using “penumbra” well

Penumbra is literally the partial shadow at an eclipse's edge; figuratively it names a zone of uncertainty surrounding a clearer core.

Common questions

Questions about “penumbra”

Penumbra (noun) means a partial shadow at the edge of a fully shaded area, or a less clear or definite part of something
Here is penumbra used in an example sentence: "The legislation existed in the penumbra of constitutional law, neither clearly permitted nor forbidden." Another example: "The court located the right within a penumbra of guarantees implied, though not stated, by the constitution."
Common synonyms for penumbra include shadow, margin, fringe.
Antonyms of penumbra include center, core, clarity.
On the GRE, penumbra clusters with shadow, margin, and fringe, opposing center, core, and clarity.
Yes. Penumbra is a high-frequency GRE word, so it is worth prioritising as you build your vocabulary.

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