鬼おに皮かわ

noun

hard outer shell

Refers specifically to the tough, hard outer shell of nuts, seeds, or similar items, as opposed to the inner skin or husk.

• 栗くりの鬼おに皮かわをむくのは大たい変へんだ。

  Peeling the hard outer shell of chestnuts is tough work.

• クルミの鬼おに皮かわはとても固かたい。

  The hard shell of a walnut is very tough.