Deepak employed my friend only when I agreed to avouch for his honesty.
A
vow
B
affirm
C
pay
D
guarantee
Correct Answer: affirm
Vow : a solemn promise.Affirm : state emphatically or publicly.
Pay : give (someone) money that is due for work done, goods received, or a debt incurred.
Guarantee : something that ensures a particular outcome.
Avouch : affirm or assert.
Synonym of Avouch is Affirm