necessary evil

gold (Au) / money / metal / (shogi) short for 金将 (kinshō): the gold general (a shogi piece)

gold / metal

metal / money / firmness, strength / completely, entirely

money / metal

(archaic) gold

gold / gold or metal currency: coins, such as 大判 (ōban) or 小判 (koban) / short for 黄金色 (kogane iro, “gold”, the color)

Jin dynasty (1115–1234)

one of the five classical elements in traditional Chinese philosophy and medicine: see the "Wu Xing" entry on Wikipedia

Kyūjitai form of 試験 (“test”)