Occasionally Hebrew letters in Tanach have a dagesh mark. I saw one in a khaf sofit, as at the end of the second line of the Priestly Blessing and the 4th line of Ashrei, and it sparked my interest. What function does that dagesh serve?
I do not understand the function of a dagesh in general. If the dagesh in a khaf sofit has a function no different from any other dagesh, please tell me about that general function. I would like to know why a dagesh appears relatively rarely in a khaf sofit and what it's function is when it appears.
The wiki article https://en.wikipedia.org/wiki/Dagesh does not explain why the dagesh is sometimes found in a khaf sofit and more often not.