COMMENT: Cf. (with an a-prothesis and *ɫ > r) Hurr. aɣri 'incense' (see Diakonoff-Starostin 1986, 55).
The EC-WC comparison seems rather probable, despite the not quite regular correspondence PEC *ɫ : PWC *Ł. Resonants are normally lost in PWC, but in this case *ɫ was retained as the only possible element (because laryngeals were also lost, and probably even before the resonants), but was transformed into a voiced lateral affricate.