Samuel Barber's Adagio for Strings is a piece of music frequently chosen to mark occasions of public mourning, including the funerals of F.D.R., J.F.K. and memorial concerts in the wake of 9/11.
It is very common for words from language to be borrowed from art so that feelings and experiences can be described in a very accurate manner, with "adagio" being a word that does convey a merger ...