The word 歌手 is formed by combining two characters: 歌 (gē), which means "song" or "to sing", and 手 (shǒu), whose literal meaning is "hand" but is used here metaphorically to mean "a person skilled in or who performs a specific activity". Together, they create a conceptual blend where 手 personifies the action of 歌, resulting in the meaning "a person whose skill or role is singing", that is, a singer. It’s a direct and vivid figurative construction, picturing the singer as the "hand" that performs the song.