דּוּר

Daniel 2:38 דָֽיְרִ֣ין [are] dwelling

Wherever the sons of men or beasts of the field or birds of the air dwell, He has given them into your hand and has made you ruler over them all. You are that head of gold.

Here: A participle meaning 'are living, are settled'. It describes ongoing residence across the whole inhabited world. The same verb returns in Daniel 4, where the birds 'dwell' in the branches of Nebuchadnezzar's tree (4:12/4:9 Aramaic) and in the king's greeting to 'all who dwell in all the earth' (4:1/3:31).

Daniel 4:1 דָיְרִ֥ין [are] dwelling

King Nebuchadnezzar, To the people of every nation and language who dwell in all the earth: May your prosperity be multiplied.

Here: 'Are dwelling / who live.' The participle describes people living somewhere as an ongoing state. Its written spelling is דארין and its traditional reading is דָּיְרִין.

Daniel 4:12 יְדוּרָן֙ they nested

Its leaves were beautiful, its fruit was abundant, and upon it was food for all. Under it the beasts of the field found shelter, in its branches the birds of the air nested, and from it every creature was fed.

Daniel 4:21 תְּדוּר֙ it dwelt

whose foliage was beautiful and whose fruit was abundant, providing food for all, under which the beasts of the field lived, and in whose branches the birds of the air nested—

Daniel 4:35 דָּיְרֵ֤י וְדָיְרֵ֖י [the] inhabitants of, and [the] inhabitants of

All the peoples of the earth are counted as nothing, and He does as He pleases with the army of heaven and the peoples of the earth. There is no one who can restrain His hand or say to Him, ‘What have You done?’”

Here: A participle meaning 'those dwelling' (participle: a verb used as a noun or adjective). It is the same phrase Nebuchadnezzar's own decrees used for his subjects (cf. 4:1 'all peoples, nations and languages who dwell on all the earth'). Now his whole realm is weighed against God.

Daniel 6:25 דָיְרִ֥ין [were] dwelling

Then King Darius wrote to the people of every nation and language throughout the land: “May your prosperity abound.

Here: 'Dwelling, living'. A participle describing where they live now: everyone currently settled anywhere in the realm. The consonants are written with an aleph and read with a yod (see variants).