aaaaaaaa  – 1. n. door that no longer opens into the world of a loved one;
aaaaaaaa  – 2. n. family member or friend who has lost the ability to recognize you:
The first time he visited his beloved grandmother in the early evening he was shocked to discover that sundowning had transformed her into aaaaaaaa . He had stopped by earlier in the day and she beamed as she opened the door and saw his face. How had her dementia morphed his physical being into a aaaaaaaaaa in the waning light?
photographic illustration available here