Final answer:
The word 'radiant' in the context of 'Most radiant Pyramus, most lily-white of hue,' is best synonymous with 'beautiful,' reflecting Pyramus's attractiveness and brilliance.
Step-by-step explanation:
In the phrase “Most radiant Pyramus, most lily-white of hue,” the word “radiant” is used to describe Pyramus in terms of attractiveness and brilliance. Given the context, the synonyms for “radiant” that would be most appropriate are words associated with physical beauty and striking presence. Therefore, out of the provided options, the word that means the same as “radiant” as it's used here is “beautiful” (d). This choice best aligns with the connotation of radiant beauty suggested in the context of the passage.