not given an anaesthetic (= a substance that makes a person or animal unable to feel pain) for an operation, test, etc., or done without an anaesthetic

The tests were done on unanaesthetized rabbits.

He performed an emergency C-section on an unanaesthetised patient to save a foetus in distress. 他为一个未被麻醉的病人进行了紧急剖腹产，拯救一个情况危难的胎儿。