friendly adjective
  1 : of, relating to, or befitting a friend:
    such as
      a : showing kindly interest and goodwill
        friendly neighbors
      b : not hostile
        a friendly merger offer
  2 : ...

seminal adjective
  1 : of, relating to, or consisting of seed ...
  2 : containing or contributing
    the seeds of later development :
    CREATIVE, ORIGINAL
    a seminal book

symbiosis noun
  1 : the living together in ...
    intimate association or close union ...
    especially : MUTUALISM
  2 : a cooperative relationship
    (as between two persons or groups)