Erosion

Etymology

From Latin "erodere" — "e" (away) plus "rodere" (to gnaw) — literally “to gnaw away,” the same root as “rodent.” The figurative sense, as in “the erosion of civil liberties,” keeps the image of something slowly chewed down.

noun · /ih-ROH-zhun/
The gradual wearing away of rock and soil by wind, water, and ice, and their transport elsewhere.
What it names
The slow sculptor of landscapes — the patient removal that carves canyons and, by metaphor, any gradual eating-away of trust, rights, or coastline.
Example
A century of erosion by the river cut the gorge hundreds of feet into solid rock.
Related idea
Erosion wears material away and carries it off; deposition drops it again, and the dropped material builds up as sediment. What erodes from a mountain often becomes the sediment layering a distant seabed.
noun · /ih-ROH-zhun/
A gradual weakening or wearing away of something abstract.
What it names
the slow decline of trust, rights, standards, or value.
Example
The scandal caused a steady erosion of public trust.
Related idea
The geological process turned into a metaphor for slow institutional loss.