effectual

American  

[ih-fek-choo-uhl] / ɪˈfɛk tʃu əl /

adjective

1. producing or capable of producing an intended effect; adequate.

2. valid or binding, as an agreement or document.

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effectual British  

/ ɪˈfɛktjʊəl /

adjective

1. capable of or successful in producing an intended result; effective

2. (of documents, agreements, etc) having legal force

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Usage

What are other ways to say effectual? Something effectual produces or is capable of producing an intended effect. But effectual isn’t quite the same as efficacious, effective, or efficient! Find out why on Thesaurus.com. 

Other Word Forms

• effectuality noun
• effectually adverb
• effectualness noun
• preeffectual adjective
• preeffectually adverb

Etymology

Origin of effectual

First recorded in 1350–1400; Middle English effectuel (from Middle French ); late Middle English effectual, from Medieval Latin effectuālis, equivalent to Latin effectu-, stem of effectus effect + -ālis -al ¹

Explanation

Effectual means good at achieving the results you want. The most effectual method for avoiding cavities? Brush, floss, lay off the candy, and see your dentist every 6 months. Wait, aren't effectual and effective basically the same adjectives with the same meaning? Well, generally speaking, yes. But if you want to get really nit-picky, you might note that effectual actually describes something that produces the desired result, but in a big way. Effective simply gets the job done. No one is going to call you out for using either word interchangeably though, as long as it's done effectually.

Example Sentences

The economy is now shifting from experiences to transformations — effectual outcomes that change individuals in a lasting way.

From MarketWatch • Mar. 27, 2026

“This case is constitutionally moot because the Court can no longer grant any effectual relief,” the companies argued in a filing with U.S.

From Seattle Times • Oct. 28, 2023

Butler’s fighting style is similar to the film’s: brawny, unshowy, effectual and explosive only when necessary.

From Los Angeles Times • Jan. 11, 2023

James Madison called it “the most complete and effectual weapon” that the House of Representatives possesses “for obtaining a redress of every grievance, and for carrying into effect every just and salutary measure.”

From Washington Post • Apr. 23, 2020

But since my intention is to write something useful for anyone who understands it, it seemed more suitable for me to search after the effectual truth of the matter rather than its imagined one.

From "The Prince" by Niccolò Machiavelli