"castled" in the verb sense
move the king two squares toward a rook and in the same move the rook to the square next past the king
"castled" in the adjective sense
1. embattled, battlemented, castled, castellated
having or resembling repeated square indentations like those in a battlement
"a crenelated molding"
Source: WordNet® (An amazing lexical database of English)
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