The cuneiform sign ik, (and iq), is a common-use sign of the Amarna letters, the Epic of Gilgamesh, and other cuneiform texts (for example Hittite texts). It has a common secondary use in the Amarna letters for "iq", for the spelling of Akkadian "qabû", for English "to speak", in dialogue to the pharaoh in the letters.
Linguistically, it has the alphabetical usage in texts for k, or q, or g. And a replacement for any of the four vowels, a, e, i, u.
The ik sign usage in the Epic of Gilgamesh is as follows: (eg, 2 times, ek, 13, eq, 2, ig, 9, ik, 51, iq, 27, and IG, 8 times).[1]