[すりあわせ, suriawase](n) (1) precision surface finishing; lapping; (2) bouncing of ideas (opinions, etc.) off each other to obtain a fine-tuned integrated whole[Add to Longdo]
[はいぐすり, haigusuri](n) ash glaze (type of fundamental glaze used in ancient times made from the ashes of raw materials such as unhulled rice, straw, oak and pine)[Add to Longdo]