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

2

: rile sense 1

intransitive verb

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

conflicting emotions roiling inside her

Synonyms

• 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 global economy has for months been roiled by a tit-for-tat of mounting tariffs, export controls and other penalties hitting areas from high-tech goods to high-seas shipping, as the US and China have vacillated between escalation and negotiation. —Betsy Klein, CNN Money, 30 Oct. 2025

The industry is also affecting an already-roiling climate with its enormous energy demands. —Bruce Schneier, IEEE Spectrum, 29 Oct. 2025

Linked by the fire, a cashier, fire-fighter, district attorney and student battle to prevent tragedy, the blaze’s consequences still roiling two decades later. —John Hopewell, Variety, 28 Oct. 2025

Gambling scandal roils the NBA A big reason for Kansas City’s success has been the improved play of its pass catchers. —Rohan Nadkarni, NBC news, 27 Oct. 2025

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