When the evening is burning with sun, it is the sun going down, getting all close to the horizon and earth. This is the sunset, or more specifically, the evening glow you can see during a sunset.
The readings are the kun'yomi vocab readings. Combine 夕 and 焼け (you learned the reading via the kanji) and you'll have ゆうやけ.
When I see sunsets, I feel empty for some reason.
My friend firmly believes that sunrise is actually sunset.
The sunset on the beach last night was so radiant it was like heaven. And because of that I went blind in my left eye.