Proto-Tsezian: *-at- / *-aṭ-
Meaning: a negative particle
Inkhokvari: -ate
Gunzib: -aṭ-
Comments: An irregular correspondence (ṭ/t) is explained by the grammatical nature of the morph. Cf. also Gunz. -iṭ- suffix of negative past gerund (showing that the vowel here does not belong to the negative affix itself).