He made an appointment with an ENT specialist for his throat problem.

ENT 是 "ear, nose, throat"（耳、鼻、喉）的缩写形式。 specialist 是名词，由形容词 special（特殊的）加上后缀 -ist（表示"从事...的人"）构成，指"专科医生"或"专家"。 ENT specialist 指专门治疗耳鼻喉疾病的医生，即"耳鼻喉科专家"。