accumulate

accumulate — verb

1. to slowly bring together a growing supply of money, objects, or knowledge throug

1.verbtransitiveC2
Definition

to slowly bring together a growing supply of money, objects, or knowledge through repeated effort across many months or years.

Example

Over twenty years, Mr. Chen accumulated a huge collection of old comic books.

accumulate + concrete object across long timespan

Aiko accumulated enough savings to buy a small apartment near the river.

accumulate + savings/wealth

Common collocations
  • accumulate wealth
  • accumulate evidence
  • accumulate experience
  • accumulate points
  • accumulate debt
Synonyms
  • amass

    more formal; usually a very large quantity, especially money or power

  • build up

    everyday phrasal verb; common in speech where 'accumulate' would feel stiff

  • collect

    neutral; can be deliberate or one-off, lacks the slow-over-time meaning

  • stockpile

    implies storing supplies in advance, often for emergencies

Antonyms
  • deplete

    use up a stored resource until little remains

  • disperse

    scatter or spread something previously gathered

Grammar Patterns

accumulate + noun (object)

Usage Note

Subject is usually a person, organisation, or institution that takes deliberate action. The object is something gathered slowly, not in one event — collections, savings, points, knowledge, debt. Distinguish from sense 2: this transitive sense names an agent doing the gathering; sense 2 has no agent — the thing simply piles up by itself.

Common Mistakes

I accumulated a new phone yesterday.
I bought a new phone yesterday.
'accumulate' needs many items collected slowly, not a single purchase.

2. of an amount, level, or material: to grow larger little by little, often without

2.verbintransitiveC2
Definition

of an amount, level, or material: to grow larger little by little, often without anyone making it happen on purpose.

Example

Dust accumulates quickly on the bookshelves in Grandma's spare room.

intransitive: [substance] accumulates + on [surface]

Snow accumulated on the roof of the cabin throughout the long January night.

passage of time + place adverbial

Common collocations
  • dust accumulates
  • snow accumulates
  • interest accumulates
  • tension accumulates
  • evidence accumulates
Synonyms
  • build up

    everyday equivalent; safer choice in casual speech

  • pile up

    stronger image of physical heaping; works for snow, laundry, bills

  • mount

    often used for tension, pressure, evidence; literary tone

  • collect

    informal for liquids or small bits gathering in one place (rainwater collected in the bucket)

Antonyms
  • dissipate

    spread out and disappear, especially of heat, fog, or tension

  • diminish

    become smaller bit by bit — opposite trajectory

Grammar Patterns

[thing] + accumulate(s)

Usage Note

No direct object — the thing that grows is the subject. Frequently paired with a place phrase ('on the roof', 'in the pipes') or a time phrase ('over the winter', 'since Monday'). Common subjects: dust, snow, water, interest, debt, evidence, tension, fat. Distinguish from sense 1: here nobody is gathering anything; the build-up happens through natural processes or simple time.

Common Mistakes

The rain accumulated the leaves on the lawn.
Leaves accumulated on the lawn after the rain.
sense 2 cannot take an object; the leaves are the subject doing the accumulating.

Word family

  • accumulation
    nounC1
  • accumulator
    nounC2
  • accumulated
    adjectiveC1
  • accumulative
    adjectiveC2

Synonym discussion

Sense: verb/1

All five words describe bringing things together, but their flavours differ. 'Accumulate' emphasises slow, ongoing growth across a long period — savings, points, dust, knowledge. 'Amass' is more formal and stresses the resulting size: someone amasses a fortune, an army, or political power, usually a striking total. 'Collect' is the most neutral and everyday word, often used for hobbies (collect stamps) or one-off rounds (collect the homework). 'Gather' suggests bringing scattered things into one spot, often quickly (gather the children, gather your notes), and lacks the long-timeframe feel. 'Stockpile' is purposeful and defensive — laying in supplies of food, fuel, or weapons in case of shortage. So you might collect coins as a hobby, gradually accumulating a valuable set, eventually amassing one of the country's largest collections — while a worried family stockpiles rice before a typhoon.

accumulate ↗amasscollect ↗gather ↗stockpile ↗

Common collocations

Nouns

Adverbs

Phrases

  • accumulate over time
  • begin to accumulate
  • continue to accumulate
  • allow [something] to accumulate

Prepositions

  • accumulate over (years/decades)
  • accumulate on (a surface)
  • accumulate in (a place/account)
  • accumulate from (a source)

Etymology

LatinEnglish

Borrowed into English in the early 1500s from Latin 'accumulatus', the past participle of 'accumulare', meaning roughly 'to heap onto a pile'. The Latin verb is built from 'ad-' ('to, toward') plus 'cumulus' ('a heap or pile') — the same 'cumulus' we still see today in the name of cumulus clouds, which look like piled-up cotton. So at heart, 'accumulate' carries the picture of one small thing being added on top of another, again and again, until a noticeable heap has formed.