Foreign origin describes linguistic history, while proper-name status describes naming a particular person or entity. They are different properties.
The text contrasts لِجَامٌ, an ordinary borrowed noun, with إِبْرَاهِيم, a foreign proper name.
It is incorrect to infer diptote status from foreign origin alone. Check whether the word was a proper name in the source language.
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Diptote Causes — Foreign Origin and Its Conditions
Foreign origin describes linguistic history, while proper-name status describes naming a particular person or entity. They are different properties.
The text contrasts لِجَامٌ, an ordinary borrowed noun, with إِبْرَاهِيم, a foreign proper name.
It is incorrect to infer diptote status from foreign origin alone. Check whether the word was a proper name in the source language.