a.ru is a demonstrative particle marking the appearance of a new sight within Daniel's vision.

Across the supplied verses, this demonstrative particle introduces a newly seen figure or event in Daniel's vision: the stirring winds, successive beasts, and one like a son of man.

1. Demonstrative marker introducing a vision sight · dominant

   The supplied morphology identifies the form as a demonstrative particle in each occurrence. In Daniel 7:2 the APB renders the clause "and behold, four winds of the heavens were stirring up the great sea"; in Daniel 7:5, Daniel 7:6, and Daniel 7:7 it introduces newly seen beasts, and in Daniel 7:13 it precedes one like a son of man coming with the clouds.

   Daniel 7:2Daniel 7:5Daniel 7:6Daniel 7:7Daniel 7:13

In the Anselm Project Bible: The APB presents the particle with "behold" in each supplied verse, introducing what Daniel sees; This reflects the clause-level presentation rather than a strict token-by-token rendering.