家庭聚会上，孩子们之间的不和谐让气氛变得紧张。

The ___discord among the children made the family gathering tense.

孩子们的尖叫和乐器的噪音混在一起，形成刺耳的不和谐音。

The ___discord of children's screams and instrument noises created an unpleasant cacophony.

这段音乐中不和谐的音符让人感到不安。

The ___discord in this piece of music makes people feel uneasy.