truthfully

adverb
1
in an honest way; by saying what is true
صادقانه, راستگویانه, با صداقت
synonym honestly(1)
2
used to emphasize that what you are saying is true, however surprising it may seem
به راستی, در حقیقت
I can truthfully say that I have never seen anything quite like it before.
synonym honestly(2)