Dissonance
Etymology
From Latin "dissonare," "to sound harshly, disagree in sound," from dis-, "apart," and sonare, "to sound." It entered English through French as a musical term for tones that grate against each other and demand resolution. Composers prize dissonance precisely because the ear craves the consonance that follows it.
noun · /DIS-uh-nunss/
A clash of sounds that feels unresolved or tense, or any jarring lack of harmony.
What it names
The deliberate musical friction that begs to resolve — and, by extension, any productive clash of elements — giving you a word for tension used on purpose rather than error.
Example
The chord hangs in dissonance for a full bar before it finally slips home into the major key.
Related idea
Dissonance is the unstable, tense sound that wants to move; consonance is the stable, restful sound it resolves into.