康熙字典
【申集上】【艸字部】䔽 ·康熙筆画:18 ·部外筆画:12
《唐韻》於蓋切,音藹。《說文》蓋也。《集韻》淸也,微也。
to cover; to put a cover over something, small, low, weak, pure; clean; clear