存続
そんぞく · sonzoku · JLPT N1 · noun
continuance
存続 = 存 (exist) + 続 (continue): keep existing and carrying on, so it means duration
存 — 才 (talent/sprout) + 子 (child)
Originally written with 才 (a sprout breaking ground) over 子 (child), suggesting a child being raised or kept alive. The character came to mean 'to exist, to remain, to preserve.' Modern uses like 存在 (exist) and 保存 (preserve) reflect this core sense of continued being.