acceding russian

• вступа́вший

  entering, joining, taking office, acceding

• присоединя́вший

  joining, attaching, annexing, acceding, having joined, having attached, having annexed

• присоединя́вшийся

  joining, attaching oneself, acceding (to), who was joining/attaching/acceding

• присоединя́ющийся

  joining, attaching, connecting, acceding