effectual

Reading level: hard

Estimated CEFR level: C1 — Advanced

Estimated from word frequency; not an official CEFR classification.

Definition

adjective producing or capable of producing an intended result or having a striking effect; -LewisMumford
adjective having legal efficacy or force

From Middle English effectual, effectuel, from Old French effectuel, from Late Latin effectualis.

[1] The protest was effectual. — A School History of the United States, John Bach McMaster
Miss Lord when incensed was effectual. — Just Patty, Jean Webster
The one effectual palliative in my case, is—opium. — The Moonstone, Wilkie Collins

effective, efficacious

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