剛 sturdy, strength 10 strokes jōyō, taught in secondary school old JLPT 1 #1576 in newspapers Readings Onゴウ In Chinese 刚, traditional 剛 Words written with it 金剛 こんごう vajra (indestructible substance) 剛毅 ごうき fortitude 剛健 ごうけん vigour