persistent

adjective

per·​sis·​tent pər-ˈsi-stənt 

-ˈzi-

1

: existing for a long or longer than usual time or continuously: such as

a

: retained beyond the usual period

a persistent leaf

b

: continuing without change in function or structure

persistent gills

c

: effective in the open for an appreciable time usually through slow volatilizing

mustard gas is persistent

d

: degraded only slowly by the environment

persistent pesticides

e

: remaining infectious for a relatively long time in a vector after an initial period of incubation

persistent viruses

2

a

: continuing or inclined to persist in a course

b

: continuing to exist despite interference or treatment

a persistent cough

has been in a persistent vegetative state for two years

persistently adverb

Synonyms of persistent

• insistent
• stubborn
• resolute
• tenacious
• dogged
• steadfast
• relentless
• patient
• determined
• constant
• dedicated
• steady
• pertinacious

Examples of persistent in a Sentence

Contrary to persistent myth, Hoover was an activist. —Steve Forbes, Forbes, 30 June 2008

The high-water mark of such truckling might be the publication of the Cato Institute report "America's Record Trade Deficit: A Symbol of Strength." Freedom had become slavery; persistent deficits had become economic power. —Eric Janszen, Harper's, February 2008

The silence started from your end just about the time you said good-bye to dear St. Elizabeth and it has been constant and persistent ever since. —Archibald Macleish, letter, 11 July 1959

We were nagged by a persistent salesman.

He is one of the government's most persistent critics.

She has been persistent in pursuing the job.

He has been fighting a persistent cold.

Flooding has been a persistent problem in the area this year.

Persistent rumors that the business is for sale have alarmed the staff.

Recent Examples on the Web

The yen has been under pressure from rising oil prices, Japan’s persistent budget deficits and a yawning interest-rate gap with the US and other major economies. — Shintaro Inkyo, Fortune, 1 Aug. 2026

The most dangerous fire conditions Saturday were mostly due to persistent strong winds and very dry conditions impacting parts of parts of Washington state and Oregon. — ABC News, 1 Aug. 2026

The article questions whether this latest vow will yield tangible results or remain another empty statement, highlighting Iraq's persistent struggle to secure its airspace. — Paul Iddon, Forbes.com, 1 Aug. 2026

After years of elevated borrowing costs and persistent inflation, a lot of borrowers are finding themselves at that tipping point right now. — Angelica Leicht, CBS News, 31 July 2026

Word History

Etymology

Latin persistent-, persistens, present participle of persistere — see persist

First Known Use

1826, in the meaning defined at sense 1

Phrases Containing persistent

• persistent vegetative state

Rhymes for persistent

• assistant
• consistent
• existent
• insistent
• resistant
• subsistent
• coexistent
• equidistant
• inconsistent
• nonexistent
• preexistent
• distant

Kids Definition

persistent

adjective

per·​sis·​tent pər-ˈsis-tənt 

-ˈzis-

1

: continuing, existing, or acting for a long or longer than usual time

a persistent cold

persistent gills

2

: stubbornly determined

persistently adverb

Medical Definition

persistent

adjective

per·​sis·​tent -tənt 

1

: existing or continuing for a long time: as

a

: effective in the open for an appreciable time usually through slow volatilizing

mustard gas is persistent

b

: degraded only slowly by the environment

persistent pesticides

c

: remaining infectious for a relatively long time in a vector after an initial period of incubation

persistent viruses

2

: continuing to exist despite interference or treatment

a persistent cough

has been in a persistent vegetative state for two years