Their views were so disharmonious that it was hard to reach a consensus.

disharmonious 是由前缀 dis-（表示"否定、相反"）和形容词 harmonious（和谐的）组成的形容词。harmonious 来自名词 harmony（和谐），加上形容词后缀 -ous 构成。disharmonious 字面意思是"不和谐的"，表示"不一致的、不协调的"。