Probably identical with 'iy (through the idea of a doleful sound); a howler (used only in the plural), i.e. Any solitary wild creature; --wild beast of the islands.
Isaiah 13:22 BIB: וְעָנָ֤ה אִיִּים֙ בְּאַלְמנוֹתָ֔יו וְתַנִּ֖ים NAS:Hyenas will howl in their fortified KJV:And the wild beasts of the islands shall cry INT: shall cry Hyenas their fortified and dragons
Isaiah 34:14 BIB:צִיִּים֙ אֶת־ אִיִּ֔ים וְשָׂעִ֖יר עַל־ NAS: will meet with the wolves, The hairy goat KJV: shall also meet with the wild beasts of the island, and the satyr INT: of the desert with the wolves the hairy unto
Jeremiah 50:39 BIB:צִיִּים֙ אֶת־ אִיִּ֔ים וְיָ֥שְׁבוּ בָ֖הּ NAS: [there] along with the jackals; The ostriches KJV: Therefore the wild beasts of the desert with the wild beasts of the islands shall dwell INT: of the desert along the jackals will live first