«هَيْهَاتَ زَيْدٌ» reports distance; it does not mean 'send Zayd away!'
In «رُوَيْدَ زَيْدًا», Zayd is an object, not a subject.
Identify the verb-noun’s category before interpreting its dependents.
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Parse Before Translating
Asmāʾ al-Afʿāl — Definition, Uses and Parsing
«هَيْهَاتَ زَيْدٌ» reports distance; it does not mean 'send Zayd away!'
In «رُوَيْدَ زَيْدًا», Zayd is an object, not a subject.
Identify the verb-noun’s category before interpreting its dependents.