Having veins or vein-like patterns; marked with lines resembling blood vessels.
From the prefix 'be-' meaning 'to cause to be' combined with 'vined' (having veins). The 'be-' prefix intensifies or emphasizes the veined quality, following Middle English word-formation patterns where 'be-' was added to adjectives to create emphasizing forms.
This is a wonderful example of how English lets us stack prefixes to intensify meaning—'bevined' doesn't just mean 'having veins,' it means 'notably, strikingly veined.' Medieval manuscripts used this prefix all the time to describe decorated pages, giving us words like 'bedecked' that follow the exact same pattern.
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