丸砥石[marutoishi] grindstone
合わせ砥[awasedo] double whetstone
青砥[aoto] medium-grade millstone
中砥[nakato] medium-grade millstone
剃刀砥[kamisorido] razor strop

砥石[toishi] whetstone
砥ぐ[togu] to sharpen
油砥石[aburatoishi] oilstone
荒砥[arato] rough grindstone
砥粉[tonoko] polishing powder

セーム革[seemugawa] chamois leather
沿革[enkaku] history
革まる[aratamaru] to be renewed
革める[aratameru] to change
改革[kaikaku] reform

改革案[kaikakuan] reform proposal
改革過程[kaikakukatei] reform process
革靴[kawagutsu] leather shoes
革新[kakushin] reform
革新系[kakushinkei] liberal