adi - up to, as far as; until, up to (connoting time); concerning, as to
(CAD A₁ 115, AHw. 12)
Also adu, gadu, ḳаdu, ḫadu, ad. The background of variants with initial ḳ and g is difficult to establish.
GAG § 114 j analyzes adīni and adīšu as lexicalized combinations of adi and pronominal suffixes.