1º_ In the game of chess it is "to attack the king of the opponent with some piece of his own". It comes from the checker voice. See checkmate. 2º_ For the previous one, "corral, avoid suddenly a foreign movement, who is usually considered an opponent". 3º_ Castilian version of the Spanish hack ( pr . jakear ) . It is almost not used. 4º_ In lunfardo it is a very little used word, and it is a misinterpretation of the Castilianized Turkish jartear ("to deceive"), surely influenced by some of the previous meanings.
