"Castles" Natural Recordings by Native Speakers
Castles refer to large, imposing structures of stone, brick, or other materials, often with towers, battlements, and fortifications, typically built in the Middle Ages as residences and fortifications for kings, nobles, and other high-ranking individuals. They were often used for defense against invaders and were a symbol of power and prestige.
Casteism is a system of social stratification in which an individual's social status and opportunities are determined by their birth, ancestry, ethnicity, or occupation. It is typically based on rigid social divisions, such as those between Brahmins, Kshatriyas, Vaishyas, and Shudras in Hinduism. In a caste system, movement between social strata is usually restricted or difficult, and individuals often face discrimination and prejudice based on their perceived social station.
Castling is a special move in the game of chess. It is the only move that allows the king to move more than one square, and it can only be done by moving the king to the opposite side of the board, while also moving the original rook (one of the chess pieces that looks like a tower) to the square that the king crossed. This move is unique in that it allows the king to move further away from the center of the board, which can make it more difficult for the opponent to capture, while also setting up the rook to attack opponent's pieces.
Castorite is a very rare mineral, a hydrated iron phosphate mineral with the chemical formula Fe3(PO4)2(OH)·6H2O. It was first described in 1869 and is named after the inventor of the blowpipe, Friedrich Müller, who is also known as "Castor". Castorite is a mineral of sedimentary origin, usually found in phosphate deposits, and it has a secondary crystal form with a white or yellowish color.