English Reference

Word

intensive

Phoneticsin·ten·sive, stress on the second syllable

US/ˌɪnˈtɛnsɪv/

UK/ɪntˈɛnsɪv/

Definitions

01thorough and concentrated

B2 · Upper Intermediate

adj. involving a lot of work, effort, or detail in a short amount of time.

adj. characterised by a high degree of concentration, thoroughness, or effort within a limited timeframe.

“The students took an intensive one-week course to improve their coding skills.”

“The diplomatic team engaged in intensive negotiations over the weekend to prevent the collapse of the trade agreement.”

02requiring much of something

C1 · Advanced Economics Academic

adj. needing a large amount of a specific resource, like money or workers.

adj. requiring a high input of a specific factor or resource relative to other factors; typically used in hyphenated compounds.

“Fruit picking is a labor-intensive job because it must be done by hand.”

“The transition to a green economy requires a shift away from carbon-intensive industries toward sustainable manufacturing processes.”

Usage

Usually follows a noun with a hyphen, such as 'labor-intensive' or 'capital-intensive'.

Synonyms

03medical care

B2 · Upper Intermediate Medicine

adj. related to the part of a hospital for people who are very seriously ill.

adj. pertaining to the continuous and extremely close monitoring of patients with life-threatening conditions.

“He was moved to the intensive care unit after his heart surgery.”

“The patient remained in intensive care for three days while the medical team monitored her respiratory function.”

Synonyms

04linguistic emphasis

C2 · Proficiency Countable noun Linguistics Technical

n. a word or part of a word that makes another word stronger.

n. a linguistic form, such as a prefix or suffix, that serves to increase the force or degree of the root word.

“In some languages, repeating a word acts as an intensive to show more power.”

“The scholar argued that the prefix in this specific dialect functions as an intensive rather than a simple directional marker.”

Synonyms

intensifier

Collocations

Common phrases and expressions where native English speakers use the word “intensive” in context.

Adjective

01. intensive programme

“The university offers an intensive programme for students who want to complete their degree in two years.”

adj + noun

02. intensive study

“After months of intensive study, she finally passed the bar exam with flying colors.”

adj + noun

03. intensive unit

“The patient was moved to the neonatal intensive unit for specialized monitoring and care.”

adj + noun

Real-World Examples

“The brief was to review six operas across seven days: intensive, but not off the scale for a critic covering a festival.”
The Guardian 10 Aug 2026
“After being in intensive care for nearly two weeks, she died on Thursday.”
BBC News 14 Aug 2026
“It has not invested in modern technology at the same rate as other countries, and suffers from a lack of theatre space, intensive care beds and staff.”
BBC News 13 Aug 2026

Etymology

The adjective is derived from Late Middle English intensive (“fervent, great, intense”), borrowed from Old French intensif, intensive (modern French intensif) + Middle English -ive (suffix meaning ‘of the nature of, relating to’ forming adjectives), equivalent to intense + -ive. Intensif is from Medieval Latin intēnsīvus, from Latin intēnsus (“attentive; eager, intent; intensive”) + -īvus (suffix forming adjectives with the sense ‘doing; related to doing’); and intēnsus is the perfect passive participle of intendō (“to stretch out, strain”), from in- (prefix meaning ‘to, towards’) + tendō (“to extend, stretch, stretch out”) (ultimately from Proto-Indo-European *tend- (“to extend, stretch”)). Doublet of intend. The noun is derived from the adjective.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Word family

ADJECTIVE

intensive(C1)

Related words

Domains

AgricultureEconomicsEducationLinguisticsMedicine

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.C1 AdvancedIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.7.0–8.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 5.0–5.595–113TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.945–990
Frequency
Common
Level
C1 · AdvancedOxford
Updated

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English Reference