noun
in the midst of busyness; while busy
Often used in set phrases like 忙中閑あり (finding a moment of leisure in the midst of busyness). Rarely used as a standalone noun in modern Japanese.
忙中閑ありで、たまにはゆっくりお茶でも飲みたいものだ。
Even in the midst of busyness, there are moments of leisure; I'd like to relax with a cup of tea once in a while.