火ひ打うち石いし

noun

flint; firestone

A hard stone used to produce sparks when struck against steel, traditionally for starting fires. In modern contexts, may also refer to the flint in lighters.

• 昔むかしの人ひとは火ひ打うち石いしと火ひ打うち金がねで火ひを起おこした。

  People in the old days started fires with flint and steel.

• ライターの火ひ打うち石いしが減へってきた。

  The flint in the lighter is wearing down.