heavily

heavily — adverb

1. to an unusually large extent, especially when describing quantities, levels of i

1.adverbB1
Definition

to an unusually large extent, especially when describing quantities, levels of involvement, or dependence

Example

The coastal region relies heavily on tourism for jobs and income.

rely heavily on [something]

Gabriela was heavily involved in organising the school's annual concert.

be heavily involved in [activity]

Common collocations
  • heavily dependent on
  • heavily involved in
  • heavily populated
  • heavily armed
  • rely heavily on
Synonyms
  • greatly

    more neutral and broader in use; fits emotional reactions like 'greatly appreciated'

  • considerably

    suggests a measurable or noticeable difference; common in comparisons

  • substantially

    emphasises real, often numerical or material change

Antonyms
  • slightly

    marks a small degree, the opposite of a large extent

  • lightly

    indicates little weight or intensity

Grammar Patterns

heavily + past participle

verb + heavily

heavily + adjective (dependent, involved)

Usage Note

Frequently appears before past participles of verbs describing distribution, involvement, or dependence (populated, guarded, armed, subsidised). Not used with adjectives that express pure emotion — 'very happy' rather than 'heavily happy'.

Common Mistakes

The city was heavily damaged by the earthquake.
The city was severely damaged by the earthquake.
'Badly' or 'severely' is more natural for physical destruction than 'heavily.'

2. involving a noticeable amount of physical weight or force, so that a movement, a

2.adverbB1
Definition

involving a noticeable amount of physical weight or force, so that a movement, action, or impact feels heavy

Example

Ravindra was breathing heavily after running up three flights of stairs.

breathe heavily

The old wooden table was heavily loaded with books and papers.

be heavily loaded with [something]

Common collocations
  • breathe heavily
  • sit heavily
  • fall heavily
  • load heavily
  • rain heavily
Synonyms
  • forcefully

    emphasises strength more than weight; used for deliberate, strong actions

  • laboriously

    suggests difficulty and effort; more formal

  • ponderously

    stresses slow, heavy movement; formal and slightly literary

Antonyms
  • lightly

    marks actions done with little force or weight

  • gently

    suggests care and softness, the opposite of force

Grammar Patterns

verb + heavily (breathe, sit, fall, load)

Usage Note

Describes physical actions involving weight or force. Typical subjects include people (breathing, sitting, walking), weather (rain), or objects that are loaded. Not used for mental or emotional weight — see sense 3.

Common Mistakes

He walked heavy down the stairs.
He walked heavily down the stairs.
'Heavily' is the adverb form needed to modify the verb; 'heavy' is an adjective.

3. causing a strong emotional or mental burden that is hard to cope with — for exam

3.adverbB2
Definition

causing a strong emotional or mental burden that is hard to cope with — for example, worrying news, serious debt, or harsh criticism

Example

The news of the accident weighed heavily on Yuki's mind for weeks.

weigh heavily on [someone]

The young couple found themselves heavily in debt after buying their first home.

be heavily in debt

Common collocations
  • weigh heavily on
  • heavily in debt
  • heavily affected
  • feel heavily
  • heavily burdened
Synonyms
  • severely

    suggests harshness or strictness; common for punishments and effects

  • grievously

    more formal and literary; suggests deep sorrow or harm

  • painfully

    emphasises the emotional or physical pain involved

Antonyms
  • lightly

    marks something that is easy to bear or accept

  • easily

    indicates something handled without difficulty

Grammar Patterns

weigh heavily on [someone]

be heavily in [state]

verb + heavily (affect, feel)

Usage Note

Subject is often something negative — debt, worry, criticism, a crisis, bad news. Distinguish from sense 2 (WITH WEIGHT OR FORCE), which describes physical weight, not emotional burden.

Common Mistakes

The problem was heavily serious.
The problem was very serious.
'Heavily' does not directly modify adjectives of severity; use 'very,' 'extremely,' or 'deeply' instead.

4. having a thick, dense, or sturdy quality — for example, areas full of trees, gla

4.adverbB2
Definition

having a thick, dense, or sturdy quality — for example, areas full of trees, glass that blocks light, or materials built to last

Example

The mountain slopes were heavily forested with pine and fir trees.

heavily forested

Shirin wore a heavily embroidered dress at her sister's wedding ceremony.

Common collocations
  • heavily forested
  • heavily tinted
  • heavily built
  • heavily carved
  • heavily made-up
Synonyms
  • thickly

    more direct for physical depth; common for layers and vegetation

  • densely

    focuses on close packing; used for forests, populations, materials

  • solidly

    emphasises sturdiness and strength rather than thickness alone

Antonyms
  • thinly

    marks a light, sparse, or delicate quality

  • sparsely

    indicates wide spacing between elements

Grammar Patterns

heavily + past participle (forested, tinted, built, carved)

Usage Note

Describes density or thickness of materials, vegetation, or built structures. Frequently pairs with past participles that denote covering, constructing, or decorating. Not used for abstract intensity — see sense 1.

Word family

  • heavy
    adjectiveA1
  • heaviness
    nounC1
  • heavyweight
    nounB2
  • heavy-duty
    adjectiveB2
  • heavy-handed
    adjectiveC1

Synonym discussion

Sense: adverb/1

All four adverbs describe a high degree, but they differ in emphasis and typical contexts. 'Heavily' often implies a sense of burden or density and pairs naturally with words about dependence, involvement, or population — for example, 'rely heavily on tourism' or 'heavily populated areas.' 'Greatly' is more neutral and focuses on emotional reactions: we say 'greatly appreciated' or 'greatly surprised,' but not 'greatly populated.' 'Considerably' suggests a noticeable, often measurable difference — 'considerably cheaper' or 'considerably fewer people' — making it frequent in comparisons. 'Substantially' leans toward significant, often documented change: 'substantially reduced costs' or 'substantially improved results.' In short, use 'heavily' to convey intensity with tangible weight, 'greatly' for emotional impact, 'considerably' for noticeable contrast, and 'substantially' for evidence-backed changes.

heavily ↗greatly ↗considerably ↗substantially ↗

Common collocations

Phrases

  • heavily + past participle (across multiple senses: populated, loaded, affected, forested)

Etymology

Proto-GermanicOld EnglishMiddle EnglishEnglish

The adverb 'heavily' was formed in late Old English from 'hefig' (heavy, having great weight) plus the adverbial suffix '-līċe' (which became '-ly'). 'Hefig' comes from Proto-Germanic '*hebīgaz', meaning 'having weight,' related to '*habjaną' (to lift, to heave). The original physical sense of 'difficult to lift' gradually expanded in Middle English to figurative meanings of burden, intensity, and density, giving rise to all four modern uses.