Senses
夜莺/ 夜鶯 nightingale
nightingale (Luscinia megarhynchos); (literary) a general term for any bird with a clear and melodious song
夜莺/ 夜鶯 prostitute
a slang term for a prostitute
夜莺/ 夜鶯 person with a beautiful voice
a person (usually a woman) who has a beautiful singing voice; a songstress