to start a fire (with wood-wood friction or by striking metal against stone)
to start a fire (with flint, by rubbing sticks together, etc.)
hand drilling (to start a fire); hand drill; rubbing sticks to make a fire
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.; purification ceremony in which sparks are struck in the direction of someone (oft. for good luck)