erosion
The gradual wearing away of soil, rock, or land by water, wind, or human activity.
ExampleCoastal erosion has changed the shape of the island over time.
ExampleHeavy rainfall increased soil erosion on farms where trees had been removed.
Usage Scenarios
Cause of land loss
Recognize erosion when the passage explains how water, wind, farming, or construction gradually removes soil, rock, or coastline.
ExampleCoastal erosion has changed the shape of the island over time.
Environmental consequence
After erosion appears, look for consequences such as lower crop yields, damaged habitats, weaker coastlines, or increased flooding.
ExampleHeavy rainfall increased soil erosion on farms where trees had been removed.
Usage Guide
Recognize erosion when a passage describes gradual wearing away. The paragraph usually explains a force such as waves, wind, rain, farming, deforestation, or construction.
High-value reading chunks include soil erosion, coastal erosion, erosion control, and prevent erosion. These phrases help you identify cause, process, and response.
Do not read erosion as general damage. IELTS passages often test the physical process: what is removed, what causes it, and what consequence follows.
Word Forms & Word Building
Erosion belongs to the erode word family, but it is not formed by simply adding -ion to erode. Treat erosion as the noun and erode as the verb.
Erode means gradually wear away; erosion names the process or result. Eroded is the adjective or past participle, as in eroded soil or eroded cliffs.
In IELTS reading, the noun often appears in compounds such as soil erosion and coastal erosion, where the first word tells you what is being worn away.
Meaning Boundaries
Erosion vs deterioration
Deterioration is general worsening. Erosion is the physical wearing away of soil, rock, land, or coastline by forces such as water or wind.
Erosion vs damage
Damage can happen suddenly. Erosion is usually gradual and process-based, which is why IELTS passages often explain causes over time.
Best IELTS context
Expect erosion in passages about coastlines, farming, deforestation, flooding, soil quality, and landscape change.
Memory Tricks
Think slow wearing away. The key IELTS reading question is usually what causes the land or soil to be removed over time.
Anchor the word in soil erosion and coastal erosion, then look for waves, wind, rain, farming, tree loss, or construction nearby.
When a paragraph mentions erosion, ask what is being worn away and what practical consequence follows.
Common Traps
Do not treat erosion as any kind of environmental damage. It specifically involves gradual wearing away or loss of soil, rock, land, or coastline.
Separate the cause from the result: waves, wind, rain, farming, or deforestation may cause erosion; lost soil or retreating coastline is the result.
Do not confuse erosion with deterioration. Deterioration is general worsening; erosion is physical wearing away.