It is not obvious that forms of the type (wV)d meaning “to, towards” are related to this preposition (Arakelova 2001:22). They are united into a separate lexeme, see *ˀVd/d.
PS
*ˁigwal- // ˁigl- - calf
(SED II No. 28, Fron. VI 30, HSED No. 1100)
PS
*ˁakbar- - mouse, jerboa
(SED II No. 30, Fron. V 296)