Amharic
akkäkä - to have an itch, to scratch o.s. with the nails
(AED 1265)
Likely derived from this nominal root.
However this and other derivatives may be loans from Gez.
Amharic
alä - without, except, other than, not, un-
(AED 1101)
Appleyard (1977:60) assumes the development *bälä > älä, which is hardly probable (it would be difficult to explain the loss of b- in that case, see EDG 37 and Arakelova 2001:28).
asalläfä - to serve (food or drink), to distribute (food or drink); to act as an usher or waiter (AED 1115)
Amharic
alläḳä - to come to an end, to be finished, to be consumed
(CDG 261)