af- = to

(1)affiliate

assonance：fill

meaning：to link an organization with another

    ecample：the hospital is affiliated with the local university.

(2)affirm

 assonance：firm

 meaning：to state firmly that something is true 

  ecample：he affirmed himself to be right.

(3)afflict

 assonance：free

 meaning：cause pain or trouble

 ecample：serious ills afflict the industry.

(4)affront

 assonance：front

 meaning：offend

 ecample：he took his son's desertion as a personal affront.