鉄てっ石せき

noun

iron and stone; iron will

Literally 'iron and stone'; figuratively used for an unyielding, firm will or determination. Often appears in set phrases like 鉄石心 (てっせきしん) 'iron will'.

• 彼かれは鉄てっ石せきの心こころを持もっている。

  He has a heart of iron and stone.

• 鉄てっ石せき心しんをもって困こん難なんに立たち向むかう。

  Face difficulties with an iron will.