kensan
1. diligent study; devoting oneself to one's studies
Noun
#80963
1. diligent study; devoting oneself to one's studies
1. striking sparks with flint and steel or by rubbing sticks together (usu. to start a fire); fire lit by sparks from flint and steel, etc.
2. purification ceremony in which sparks are struck in the direction of someone (oft. for good luck)
1. to start a fire (with wood-wood friction or by striking metal against stone)
1. boring machine; punching machine