sustain

1 of 2

verb

sus·​tain sə-ˈstān 

sustained; sustaining; sustains

transitive verb

1

: to give support or relief to

2

: to supply with sustenance : nourish

3

: keep up, prolong

4

: to support the weight of : prop

also : to carry or withstand (a weight or pressure)

5

: to buoy up

sustained by hope

6

a

: to bear up under

b

: suffer, undergo

sustained heavy losses

7

a

: to support as true, legal, or just

b

: to allow or admit as valid

the court sustained the motion

8

: to support by adequate proof : confirm

testimony that sustains our contention

sustainedly

sə-ˈstā-nəd-lē 

-ˈstānd-lē

adverb

sustainer noun

sustain

2 of 2

noun

: a musical effect that prolongs a note's resonance

utilizing heavy sustain on his guitar

—Bill Dahl

Did you know?

The word sustain is both handy and hardy. Its use has been sustained since the days of Middle English (its ultimate source is Latin sus-, meaning "up," plus tenēre, meaning "to hold") by its utility across a variety of consequential subjects, from environmental protections to legal proceedings to medical reports. The word is so prevalent and so varied in its application, in fact, that it enjoys sustained high ranking as one of our top lookups—evidence of our readers’ sustained commitment to, well, sustaining themselves with information about words.

Synonyms

Verb

• nurture
• satisfy
• nourish
• feed

Examples of sustain in a Sentence

Verb

Hope sustained us during that difficult time.

The roof, unable to sustain the weight of all the snow, collapsed.

The army sustained heavy losses.

He sustained serious injuries in the accident.

Recent Examples on the Web

Verb

Otis also applies these innovations to some of its older units, bringing new technology to older buildings so that infrastructure can continue to sustain itself. —Katherine Fung, MSNBC Newsweek, 24 Oct. 2025

However, the direct impact of stretching on blood pressure is small and not sustained, especially when compared to cardio-type exercises, Heffron added. —Stephanie Brown, Verywell Health, 24 Oct. 2025

Noun

Four preset treatments—better aging, skin clearing, skin sustain, and the LED-free undereye revive—can be selected with the attached remote, all of which last under 15 minutes. —Sophia Panych, Allure, 16 Sep. 2025

Consider the guardrails and safety mechanisms needed to assess and mitigate risk—from bias and hallucinations to privacy concerns and ethical data usage. Launch and sustain. —Pete Giorgio, Forbes.com, 2 Sep. 2025

Word History

Etymology

Verb

Middle English sustenen, from Anglo-French sustein-, stem of sustenir, from Latin sustinēre to hold up, sustain, from sub-, sus- up + tenēre to hold — more at sub-, thin

First Known Use

Verb

13th century, in the meaning defined at sense 1

Noun

1972, in the meaning defined above

Rhymes for sustain

• abstain
• airplane
• alkane
• arcane
• arraign
• attain
• backplane
• betaine
• biplane
• blockchain
• butane
• campaign

Kids Definition

sustain

verb

sus·​tain

sə-ˈstān

1

: to give support or relief to

2

: to supply with nourishment

food sustains our bodies

3

: to keep up : prolong

a book that will sustain your interest

4

: to support the weight of : carry

5

: to keep up the spirits of

hope sustained the people

6

a

: to bear up under : endure

b

: experience entry 2, undergo

sustained a serious wound

7

a

: to support as true, legal, or just

b

: to allow or admit as right

the court sustained the motion

8

: prove sense 2a, confirm

sustainable

-ˈstā-nə-bəl

adjective

sustainer noun

Legal Definition

sustain

transitive verb

sus·​tain sə-ˈstān 

1

: to support as true, legal, or just

2

: to allow or uphold as valid

sustain an objection

compare overrule sense 1

sustainable adjective