👉 Harmonisable is a term used in mathematics and physics to describe a system that can be made more stable or less unstable by adding or removing terms from its equation. The idea is that if it's already stable, adding more terms will make it more unstable, while removing them will make it less stable. For example, if you have a system of equations where one term is already balanced, adding another term to balance the entire equation can increase stability, but removing that term will decrease stability.