Literary critics were in total disagreement about the book.

disagreement 是由动词 agree（同意）加上否定前缀 dis-（表示"不"）构成的名词，字面意思是"不同意"。后缀 -ment 将动词转化为名词，表示状态或行为。disagreement 指"意见分歧、不一致"。