roil

verb

ˈrȯi(-ə)l 

transitive sense 2 is also

ˈrī(-ə)l 

roiled; roiling; roils

transitive verb

1

a

: to make turbid by stirring up the sediment or dregs of

b

: to stir up : disturb, disorder

a crisis roiling the stock market

2

: rile sense 1

intransitive verb

: to move turbulently : be in a state of turbulence or agitation

conflicting emotions roiling inside her

Synonyms of roil

• swirl
• churn
• boil
• seethe

Examples of roil in a Sentence

Financial markets have been roiled by the banking crisis.

the waters of the gulf tossed and roiled as the hurricane surged toward the shore

Recent Examples on the Web

But as the strike dragged on some workers were desperate to make ends meet and ready to cross the picket line, dividing a community already betrayed by a once progressive company and roiled by blockades, riots, and the intervention of the National Guard. —Jill Goldsmith, Deadline, 1 May 2026

But the closing of the strait has roiled global energy markets, which set the price of oil futures higher. —Chris Isidore, CNN Money, 1 May 2026

The sector has been roiled by concerns that artificial intelligence could disrupt legacy software businesses, an area where private credit lends heavily. —USA Today, 28 Apr. 2026

Homicide and nonfatal shooting totals fell again in 2023, but the city was roiled by robbery and carjacking crews responsible for an overall uptick in violence. —Kori Rumore, Chicago Tribune, 27 Apr. 2026

Word History

Etymology

origin unknown

First Known Use

1590, in the meaning defined at transitive sense 1a

Rhymes for roil

• boil
• broil
• coil
• foil
• oil
• soil
• spoil
• toil
• voile
• aerofoil
• cinquefoil
• hydrofoil

Kids Definition

roil

verb

ˈrȯi(ə)l 

sense 2 is also ˈrī(ə)l

1

: to make cloudy or muddy by stirring up

roil the water of a brook

2

: to rouse the anger of