crust
https://gyazo.com/919f7c9df869a047581f3e9e6949d107
source: [三者三葉の西川葉子が質素にもパンの耳を食べるGIF画像｜無料GIF画像検索 GIFMAGAZINE 936886]
noun
the tough outer part of a loaf of bread:
パンの耳, 皮,
e.g. a sandwich with the crusts cut off
e.g. I tore off several pieces of crust from the loaf.
a hard, dry scrap of bread:
(ひからびた)ひと切れのパン
e.g. a kindly old woman might give her a crust.
a layer of pastry covering a pie.
パイ, ピザの皮
a hardened layer, coating, or deposit on the surface of something, especially something soft:
かたくなった表面, かたい外皮; (傷口の)かさぶた.
e.g. a crust of snow.
the outermost layer of rock of which a planet consists, especially the part of the earth above the mantle:
〘地〙 地殻, 表層
e.g. the earth's crust
e.g. at the midocean ridge new crust is formed.
a deposit of tartrates and other substances formed in wine aged in the bottle, especially port.
verb no object
form into a hard outer layer:
かたい皮, 表面になる; 表面が凍る(over).
e.g. the blisters eventually crust over.
with object cover with a hard outer layer:
…をかたい皮, 表面で覆う; かたい表面にする.
e.g. the burns crusted his cheek.
ORIGIN
Middle English: from Old French crouste, from Latin crusta ‘rind, shell, crust’.