The cuneiform sign at, is a common-use sign of the Amarna letters, the Epic of Gilgamesh, and other cuneiform texts (for example Hittite texts). It has secondary uses in the Amarna letters for "ad".
Linguistically, it has the alphabetical usage in texts for a, (also the 4 vowels, a, e, i, u), and t, and d.
ṣabātu, (sa-ab-ta-at-mi3), using at (cuneiform), line 12 (last full line (in cropped photo), of 15 lines on Obverse) ṣabātu = (English, "to seize, capture")[2]