crust

• n. 殻；殻；クラスト；硬い外皮
• vi.
• 痂皮で覆う。

元々は凍結によって形成された地殻を指す。

crust

crust: [14] Latin crusta meant ‘hard outer covering, shell’ (it is related to a number of words, including ultimately crystal, denoting a hard surface caused by freezing). Old French acquired it as crouste (the modern French form cro?te formed the basis of cro?ton, borrowed into English in the early 19th century), and passed it on to Middle English as cruste. Crusta formed the basis of the modern Latin adjective crustāceus ‘having a shell’, applied in the early 19th century to the crustacea or crustaceans. And a custard was originally a kind of pie enclosed in a crust.
=> cro?ton, crystal, custard

crust (v.)

late 14c.; see crust (n.). Related: Crusted; crusting.

crust (n.)

early 14c., "hard outer part of bread," from Old French crouste (13c., Modern French cro?te) and directly from Latin crusta "rind, crust, shell, bark," from PIE *krus-to- "that which has been hardened," from root *kreus- "to begin to freeze, form a crust" (cognates: Sanskrit krud- "make hard, thicken;" Avestan xruzdra- "hard;" Greek krystallos "ice, crystal," kryos "icy cold, frost;" Lettish kruwesis "frozen mud;" Old High German hrosa "ice, crust;" Old English hruse "earth;" Old Norse hroer "scurf"). Meaning "outer shell of the earth" is from 1550s.

1. Sergeant Parrott normally spoke with an upper- crust accent.

パロット軍士の言葉には通常、上流社会のアクセントが付いている。

2.The pastry crust was always underdone.

パイの殻はよく焼けない。

3.The crust of the bread is burnt.

このパンの外皮は焦げている。

4.Inhis early days，he would do almost anything to earn a crust from the sport.

昔はスポーツ界で食事をするために、彼はほとんど何でもしていた。

5.The most ancient parts of the continental crust are 4000 million years old.

大陸の地殻の最も古い部分には40億年の歴史がある。