of the hip or of the nerve which goes from the pelvis to the thigh (= the sciatic nerve) 坐骨的；坐骨神经的 Oxford Collocations DictionarySciatic is used with these nouns:- nerve
Word Originearly 16th cent. (as a noun denoting sciatica): from French sciatique, via late Latin from Greek iskhiadikos ‘relating to the hips, subject to sciatica’, from iskhion ‘hip joint’.