An improvement.
The act of making better.
The process by which a term gains a more positive connotation over time.
An ameliorative change of a concept or a repertoire of concepts.
A drop to a lower status or condition; decline.
A particular extension of the idea of gluing.
A falling upon or invasion.
A sloping passage or incline.
Lineage or hereditary derivation.
An instance of descending; act of coming down.
A way down.