an unpleasant sound or combination of sounds

The third movement failed to impress me and came close to discordance in my ears. 第三乐章没能打动我，我觉得听起来很不和谐。

a disagreement, or the quality of not being in agreement with something or someone else

"There is no discordance between this report and the president's position on climate," he claimed. 他声称：“这份报告与总统在气候问题上的立场没有不一致之处。”

Perhaps this incident will allow us to move on from current political discordances. 也许这一事件将使我们能够结束目前的政治分歧。

the quality of looking or sounding different or wrong compared with other things, or an example of this

The discordance between the play's bleak philosophy and its cheerful surface is interesting. 这部戏绝望的哲学观与其欢快的表演之间的不和谐感十分耐人寻味。

The language of a novel should fit the tone of the story - unless a sense of discordance is the intended effect. 小说的语言应该适合故事的基调——除非不和谐的感觉是作者预期的效果。