This is the 5597th most frequent Japanese word.
こがね
"こがね" (kogane) means "gold" or "golden."
In this sentence, 'こがね' (kogane) refers to the golden color of the sunset, metaphorically describing its beauty.
夕陽はこがね色に輝いている。
The sunset is shining with a golden color.
Here, 'こがね' (kogane) directly refers to gold, the precious metal, emphasizing the subject's interest in collecting valuable items.
彼は古代のこがねを集めるのが趣味です。
Collecting ancient gold is his hobby.
In this instance, 'こがね' (kogane) is used as part of 'こがね虫' (koganemushi), meaning golden beetles, describing their appearance.