Comment: The basic root is verbal, "to fill", cf. Lezg. ac̣u- (praet. ac̣u-na), Tab. a=c̣-, Ag. ac̣- (Bursh. ac̣i-), Rut. term. a=c̣ɨ-r, Tsakh. ǵ-a=c̣a-, Arch. ā=c̣a-, Bud. s-a=c̣-. Initial *hI- is reconstructed mainly on basis of the Kryz ʕ- (and possibly the Arch. vowel length) which, however, may be a prefix. In some languages the attributive form means also 'thick' (Tab. ac̣u, Lezg. Khl. jac̣ɨ).