Complete the following sentence with a (compound) word derived from the one(s) given in bracket.
He appeared to be suffering from a severe mental （ ） and was sent to hospital. (order)
【正确答案】：DISORDER
【题目解析】：
本题考查的是常见名词的衍生名词。
由suffer from(遭受、患病)可知，空缺处应填表疾病的名词，order加上否定前缀衍生为disorder意为“紊乱”，mental disorder意为“精神错乱”。
句意：他似乎患有严重的精神疾病，因此被送往了医院。