grandmaternal

English

Etymology

grand- +‎ maternal

Adjective

grandmaternal (not comparable)

1. of or relating to a grandmother
   • 2023, Eleanor Catton, Birnam Wood, page 213:

     Though it was a maternal feeling of a kind she hadn't really known with her own children; perhaps, in fact, a grandmaternal feeling, wise, affectionate, forbearing, soft-hearted, but also a little weary, a little retrospective, a little removed...