The doctor was known as the best resuscitator in the hospital, saving many critically ill patients.

resuscitator 是由动词 resuscitate（使复苏、使苏醒）加上名词后缀 -or 构成的名词，表示"进行复苏操作的人或设备"。resuscitate 本身由前缀 re-（表示"重新"）和拉丁词根 suscitare（"使升起、唤醒"）组成，字面意思是"使重新苏醒"。 resuscitator 在这里指"实施复苏抢救的专家"，即"复苏专家"。