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  3. /act

act

Latin

Variants

actag

Related Roots

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About This Root

From Latin agere (to do, drive, lead) and its past participle actum. One of the most common roots in English, powering words from performance (act, actor, action) to involvement (interact, active, activate). Prefixes shape the action's direction: en- makes something happen (enact), hyper- intensifies it (hyperactive).

Associated Words

act

To do something; Something done, a deed

NGSL 1kA2

acting

The art of performing roles; temporarily filling another's position

TOEFLA2

action

To act on a request etc, in order to put it into effect; Something done so as to accomplish a purpose

NGSL 1kIELTSTOEFL

actions

Things done to accomplish a purpose; deeds or behaviors

IELTSA1

activate

To start or enable a device or process

IELTSTOEFLA2

activation

The process of making something active or operational

A2

activator

Something or someone that activates a process or reaction

A2

active

Energetic and engaged in activity; currently operating

NGSL 2kTOEFLB1

actively

In an energetic and engaged manner

TOEFLB2

activist

A person who campaigns for political or social change

A2

activities

Things done for work, pleasure, or a specific purpose

IELTSA1

activity

The state or quality of being active; activeness

NGSL 1kIELTSA1

actor

A person who performs in plays or films; someone who takes action

NGSL 2kIELTSA1

actress

A woman who performs in plays or films

B1

actually

(modal) In act or in fact; really; in truth; positively

NGSL 1kTOEFLA2

actuate

To put into motion; to motivate someone to act

TOEFLGREC2

adjudicator

A person who makes official judgments or settles disputes

C2

agencies

Organizations or government departments that provide services or act on behalf of others

IELTSA2

agency

The capacity, condition, or state of acting or of exerting power

NGSL 1kIELTSA2

agenda

A list of items to be discussed or a plan of things to do

NGSL 3kIELTSTOEFL

agent

One who exerts power, or has the power to act

NGSL 1kTOEFLA2

agility

The ability to move or think quickly and easily

TOEFLGREC2

agitate

To disturb or upset someone; to shake; to campaign for a cause

TOEFLGREC2

agitated

Feeling anxious or upset; moving in a disturbed manner

GREC2

counteract

To reduce or neutralize the effect of something by acting against it

TOEFLGREC2

counteraction

An action that opposes or neutralizes another

C2

deactivate

To make something inactive or no longer effective

GREA2

enact

To pass into law; to perform or act out

TOEFLGREB2

enactment

The passing of a law; a piece of enacted legislation

TOEFLB1

exact

Perfectly accurate in every detail; to demand something forcibly

NGSL 3kTOEFLGRE

exacting

Making great demands; requiring great care or precision

TOEFLGREB1

exactitude

The quality of being precise and accurate

GREC2

exactly

precisely; used to express agreement

NGSL 1kA2

exiguous

Very small in amount; scanty or meager

GREC2

fast-acting

Taking effect quickly

hyperactive

Abnormally or excessively active

A2

hyperactivity

Excessive and uncontrollable restlessness or movement; 多动症,活动过度

GREA2

inactivate

To make something inactive or unable to function

TOEFLA2

inactive

Not active or not functioning

A2

inactivity

The state of being inactive; idleness

A2

injudicious

Showing poor judgement; unwise or ill-considered

C2

interact

To communicate or act together; to have an effect on each other

IELTSTOEFLB1

interaction

Mutual action or exchange between people or things

NGSL 2kTOEFLGRE

interactive

Allowing two-way communication or response; involving active participation

TOEFLB2

interactively

In a mutually interactive manner

A2

judiciously

With good sense and careful judgment

C2

long-acting

Producing effects over a long period of time

practice

repeated exercise to improve a skill; the doing of something

NGSL 1kIELTSA1

propagate

To spread ideas widely; to reproduce or multiply

IELTSTOEFLGRE

propagation

The spreading of something; reproduction of organisms; movement of a wave

GREB1

radioactive

Emitting ionizing radiation from unstable atomic nuclei

B2

react

To respond to something; to undergo a chemical reaction

NGSL 3kTOEFLB1

reactant

A substance consumed in a chemical reaction

GREA2

reaction

A response to an event or stimulus; a chemical transformation of substances

NGSL 2kB2

reactionary

Strongly opposing change; a person who favors returning to the past

GREA2

reactive

Responding to stimuli; readily undergoing reactions; 有反应的,被动应对的

A2

reactor

A nuclear or chemical reaction device

A2

retroactive

Taking effect from a date in the past; applying to prior events or conditions

GREC2

satisfactorily

In a way that meets requirements adequately

B2

short-acting

Having a medical effect that lasts only a short time; 短效的

slow-acting

Taking effect gradually rather than immediately

transact

To carry out or conduct business or dealings

TOEFLA2

transaction

A business deal or exchange; the act of conducting business

IELTSTOEFLGRE

transactor

A person who conducts a business transaction

A2