Jinmeiyō kanji, used in names
Stroke count: 10
Meaning: whetstone, grindstone
Kunyomi: と といし と.ぐ みが.く
Onyomi: シ テイ キイ チ
Composition: 石
Radical: 石
Meaning: stone
砥 (と) whetstone, grindstone
研ぐ (とぐ) to sharpen, to hone, to whet, to grind, to wash (rice), to scour, to polish, to burnish
青砥 (あおと) medium-grade millstone
中砥 (なかと) medium-grade millstone
砥石 (といし) whetstone, grindstone