What does effectual mean?
'Effectual' is a formal adjective meaning capable of, or successful in, producing a desired result. When a law, measure, remedy, or course of action is described as effectual, the emphasis falls on the outcome actually being achieved rather than merely attempted. The word carries a slightly elevated, old-fashioned flavour: modern speakers usually say 'effective', reserving 'effectual' for legal drafting, religious or devotional language (as in 'effectual fervent prayer'), and literary prose. It derives from Latin efficere, 'to bring about' or 'accomplish', entering English in the late sixteenth century alongside related forms such as 'effective' and 'effectuate'. Common pairings include 'an effectual remedy', 'effectual means', and 'to prove effectual'. Its antonym, 'ineffectual', remains far more frequent in current usage than the positive form — describing people or efforts that fall short despite exertion — making 'effectual' a word whose negative counterpart now outshines it.
adjective(especially of something desired or attempted) successful in producing a desired or intended result; effective.
- Producing, or able to produce, the desired result; having a decisive or sufficient effect (often used of laws, measures, remedies, or prayers).
"The new regulations proved effectual in reducing workplace accidents."
"Diplomatic pressure finally proved effectual, and both sides agreed to talks."
"In older legal texts, 'effectual' describes provisions sufficient to achieve their stated purpose."
Samuel Johnson defined 'effectual' as 'producing the effect intended' — and his own dictionary was itself one of the most effectual works in English literary history.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of effectual
The word 'effectual' entered English in the late sixteenth century, borrowed from Old French effectuel or formed directly from Latin effectus ('accomplishment, result'), the past-participial stem of efficere, 'to bring about, accomplish'. This root also underlies 'effect', 'effective', and 'effectuate', all sharing the sense of bringing something to completion. Over time, 'effective' displaced 'effectual' in general use, leaving the latter largely confined to formal, legal, and literary contexts.
Related word forms
How effectual is actually used
'Effectual' belongs chiefly to formal, legal, and literary registers; it sounds dated or elevated in everyday conversation, where 'effective' has largely taken over. It frequently appears with verbs such as 'prove' and adjectives like 'sufficient'.
Easily confused with effectual
'Effective' is the everyday word for something that works, while 'effectual' is a more formal, somewhat old-fashioned synonym emphasizing the actual accomplishment of an intended result.
'Efficacious' typically describes remedies, medicines, or methods that reliably produce the desired effect, whereas 'effectual' applies more broadly to actions, laws, or measures.
'Ineffectual' is not a variant but the direct antonym of 'effectual', meaning failing to produce the intended result.