To raise the level or grade of land by depositing sediment and alluvial material on it.
Back-formation from 'aggradation' using the base form '-grade' (from Latin 'gradus'). Created as a verb in geology to express the active process of land building.
When heavy floods dump tons of sediment across a floodplain, that's 'aggrading' in action—over centuries, a riverbed can rise 20 feet or more through this gradual accumulation.
Complete word intelligence in one call. Free tier — 50 lookups/day.