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effectual

[ih-fek-choo-uh l]
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adjective
  1. producing or capable of producing an intended effect; adequate.
  2. valid or binding, as an agreement or document.

Origin of effectual

1350–1400; Middle English effectuel (< AF), late Middle English effectual < Medieval Latin effectuālis, equivalent to Latin effectu-, stem of effectus effect + -ālis -al1
Related formsef·fec·tu·al·ly, adverbef·fec·tu·al·ness, ef·fec·tu·al·i·ty, nounpre·ef·fec·tu·al, adjectivepre·ef·fec·tu·al·ly, adverb

Synonyms

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1. See effective.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for effectually

effectually

adverb
  1. with the intended effect; thoroughly
  2. to all practical purposes; in effect

effectual

adjective
  1. capable of or successful in producing an intended result; effective
  2. (of documents, agreements, etc) having legal force
Derived Formseffectuality or effectualness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for effectually

effectual

adj.

late 14c., Old French effectuel, from Late Latin effectualis, from Latin effectus "accomplishment, performance" (see effect (n.)). Used properly of actions (not agents) and with a sense "having the effect aimed at." Related: Effectually; effectuality.

Online Etymology Dictionary, © 2010 Douglas Harper