intensify

verb

in·​ten·​si·​fy in-ˈten(t)-sə-ˌfī 

intensified; intensifying

intransitive verb

: to become intense or more intensive : grow stronger or more acute

transitive verb

1

: to make intense or more intensive : strengthen

2

a

: to make more acute : sharpen

b

: to increase the density and contrast of (a photographic image) by chemical treatment

intensification

in-ˌten(t)s-fə-ˈkā-shən 

-ˌten(t)-sə-

noun

Synonyms

• deepen
• enhance
• heighten
• strengthen

Examples of intensify in a Sentence

We could hear the wind howling outside as the storm intensified.

They intensified their efforts to increase sales.

an intensified search for survivors

Recent Examples on the Web

Scientists, as a group, lean more Democratic and less Republican than the rest of the public, a trend that seems to have intensified in recent decades. —Katherine J. Wu, The Atlantic, 23 Aug. 2025

West won't feel the fall preview Folks in the West would welcome some of the chill that will overtake the Midwest and Northeast: Dangerous heat is expected to intensify and expand in coverage over much of the western U.S. into the weekend, the National Weather Service said. —Doyle Rice, USA Today, 23 Aug. 2025

Meanwhile, in North America, U.S.-Mexico tensions over the Rio Grande and Colorado River intensified in recent years as drought hampered treaty compliance. —Eyal Harel, Forbes.com, 22 Aug. 2025

After a slow start to the North American monsoon season, forecasters say the atmospheric pattern is now intensifying, raising both hopes for drought relief and fears of flash flooding. —Theo Burman, MSNBC Newsweek, 22 Aug. 2025

Word History

First Known Use

1817, in the meaning defined at transitive sense 1

Rhymes for intensify

• acidify
• alveoli
• areolae
• demystify
• detoxify
• disqualify
• diversify
• electrify
• exemplify
• fasciculi
• identify
• indemnify

Kids Definition

intensify

verb

in·​ten·​si·​fy in-ˈten(t)-sə-ˌfī 

intensified; intensifying

: to make or become intense or more intensive

intensification

-ˌten(t)-sə-fə-ˈkā-shən 

noun

intensifier

-ˈten(t)-sə-ˌfī(-ə)r

noun

Medical Definition

intensify

verb

in·​ten·​si·​fy in-ˈten(t)-sə-ˌfī 

intensified; intensifying

transitive verb

1

: to make intense or more intensive

2

a

: to increase the density and contrast of (a photographic image) by special treatment

b

: to make more acute

use of illicit drugs intensified the patient's condition

intransitive verb

: to become intense or more intensive : grow stronger or more acute

the sore throat, headache, and fever intensified as the disease progressed

intensification

-ˌten(t)s-(ə-)fə-ˈkā-shən 

noun