Normally, we can conceive that interclūdō (hold off) and prohibeō (prohibit) would take an accusative Person with an ablative Object (of separation).
- He blocked their every approach: hōs totō aditū interclūsit.
- They prohibit our approach: nōs adventū prohibent.
However, verbs of of defending, prohibiting and protecting may also take the accusative Object and dative Person.
- He blocked their every approach: hīs totum aditum interclūsit.
- They prohibit our approach: nōbis adventus prohibent.
Verbs with this Construction:
- dēfendō, dēfendere, dēfensī, dēfensus: to defend
- prohibeō, prohibēre, prohibuī, prohibitus: to prohibit or defend
- interclūdo, interclūdere, interclūsī, interclūsus: to hold off
- dētineō, dētinēre, dētenuī, dētentus: to hold off
- muniō, munīre, munīvī, munītus: to wall off, defend
- servō, servāre, servāvī, servātus: to defend
Recall that interdīcō is an exception: taking dative+accusative or dative+ablative.
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The Essential AG: 364n2