甲こう羅ら

noun

shell; carapace; plastron

Refers to the hard outer shell of animals such as crabs, turtles, and tortoises. Carapace is the upper shell, plastron the lower.

• カニの甲こう羅らはとても硬かたい。

  A crab's shell is very hard.

• 亀かめが甲こう羅らに頭あたまを引ひっ込こめた。

  The turtle pulled its head into its shell.

noun

(person's) back

Figurative use comparing a person's back to a shell, often implying a broad, sturdy, or experienced back. Common in expressions like 甲羅を経る (to gain experience).

• 彼かれは長なが年ねんの経けい験けんで甲こう羅らが厚あつい。

  He has a thick skin from years of experience.

noun

years of experience

Metaphorical extension from the shell/back sense, referring to accumulated experience or expertise. Often used in set phrases like 甲羅を経る.

• 甲こう羅らを経へた職しょく人にんの技わざは見み事ごとだ。

  The skill of a veteran craftsman is impressive.