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Verbal contexts contribute to the interpretation of a word by helping to select the applicable sense or use.  Some contexts are deemed diagnostic, in this regard, while others are relatively less helpful.  I call them »indifferent«, such as colors and shapes for names of objects, since all objects have a color and a shape.  Rare or less common words have a similar effect:  »pellucid« in »a pellucid writing style«, for instance.  If the contextual term or co-occurrent is itself polysemous, the larger context is required.  For example, »pellucid« means both »easy to understand« and »lucid«, which cannot be applied simultaneously. 
 
 
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