a-    = of

(1)   adown

 assonance :  down

 meaning :  from a higher to a lower situation

 example :  her hair adown her shoulders.

(2)   afresh 

     assonance :  fresh

 meaning :  anew

 example :  start afresh

(3)  akin

 assonance : kind

 meaning :  similar

 example :  akin to pity