Home / Words / erodeNo. 0139

erode

/ɪˈroʊd//ɪˈrəʊd/·verb
to wear away gradually, by natural forces or steady pressure
Fig. 1 — A headland of stacked stone stands over the sea, and the waves come at it one after another.
01Definition

To erode is to wear away grain by grain. Rivers erode canyons and waves erode coastlines; in the word's busy figurative life, inflation erodes savings, scandals erode trust, and small compromises erode principles. The Latin root rodere means 'to gnaw' — the rodent shares it — and the image is exact: damage with teeth too small to see. No single encounter changes anything measurable. The loss appears only when you compare what stands today with what stood before.

02In use
  • iCenturies of wind and rain have eroded the cliff face into strange pillars.
  • iiYears of broken promises eroded public trust in the institution.
  • iiiInflation quietly erodes the value of money left sitting in an account.
03Collocations
  • erode trust
  • erode confidence
  • coastal erosion
  • soil erosion
  • erode the value of

Family erosion (noun) · eroded (adjective) · erosive (adjective)

04Relations

=wear away, corrode, undermine, eat away at, weather

≠build up, strengthen, accumulate

06TOEFL & IELTS

Doubly useful: TOEFL geology and ecology passages use the literal sense — soil and coastal erosion are classic topics — while IELTS Writing Task 2 thrives on the figurative one: 'erode trust/confidence/rights' upgrades any paragraph about gradual decline. The noun is 'erosion'. Things can erode on their own or be eroded by an agent; keep 'soil erosion' and 'coastal erosion' as ready-made collocations.

07Asked
What is the difference between erode and corrode?
Erode is physical wearing away — wind, water, or friction removing material grain by grain, as a river erodes a canyon. Corrode is chemical breakdown — a substance reacting and eating itself away, as rust corrodes iron or acid corrodes metal. Erosion is mechanical; corrosion is chemical. Both are gradual losses, but by very different means.
What does it mean to 'erode trust'?
To wear it down slowly through repeated small blows, until little is left — no single lie destroys trust, but a run of them erodes it. The figurative use is the word's busiest, covering confidence, rights, support, and principles. The scene above is its logic: waves that never win a single round, yet leave the cliff smaller each time.
What is erosion?
The noun for the wearing-away process, especially in geology: soil erosion strips farmland, coastal erosion eats shorelines, and wind, water, and ice are its main agents. It is a TOEFL earth-science staple. Figuratively, 'the erosion of' names any slow decline — of trust, of standards, of a majority — one small loss at a time.
Is 'erode' formal? What can I say instead?
Erode is the formal, single-word choice; 'wear away' or 'wear down' is the everyday phrasal equivalent. In exam writing, 'inflation erodes savings' reads a band higher than 'inflation slowly reduces savings'. Save 'wear away' for the literal and casual; reach for erode when you want one precise verb, literal or figurative.
Do you erode something, or does it erode on its own?
Both — erode works transitively and intransitively. An agent can erode a thing ('the waves eroded the cliff', 'inflation erodes savings'), or the thing can simply erode ('the cliff eroded over centuries', 'public trust eroded'). The choice is a matter of focus: name the force, or watch the loss happen on its own.
What is the difference between erode and undermine?
Erode wears something away gradually and cumulatively, from the surface inward. Undermine weakens it from underneath, at the foundation, and can be sudden or deliberate — you undermine an argument with one fatal flaw. Erosion is patient and even; undermining is targeted. Rights erode over years; a single scandal can undermine a leader overnight.