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

The earthquakes, among the strongest to strike Venezuela in more than a century, roiled the region, with buildings evacuated in cities and areas impacted as far as Brazil’s Amazon about 1,700 kilometers (1,050 miles) from Venezuela's capital Caracas. — ABC News, 25 June 2026

But as fights over AI and data centers have roiled politics in recent weeks, legislation to regulate both has languished nationally and in Missouri. — Kacen Bayless, Kansas City Star, 24 June 2026

Meta has seen firsthand how morale can roil the workplace. — Sasha Rogelberg, Fortune, 23 June 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, 22 June 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