Dictionary

effectual en · ADJ

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

Producing the intended result; entirely adequate.
- Redoubling, then, the active energy of his thrusts, favoured by the fervid appetite of my motions, the soft oiled wards can no longer stand so effectual a picklock, but yield, and open him an entrance. 1749, [John Cleland], “(Please specify the letter or volume)”, in Memoirs of a Woman of Pleasure [Fanny Hill], London: […] [Thomas Parker] for G. Fenton [i.e., Fenton and Ralph Griffiths] […], →OCLC:
- In the living state, the body is observed to […] adopt most effectual measures for the permanent continuance of its species. 1822, John Barclay, chapter I, in An Inquiry Into the Opinions, Ancient and Modern, Concerning Life and Organization, Edinburgh; London: Bell & Bradfute; Waugh & Innes; G. & W. B. Whittaker, section I, page 1:

Spelling	Features	Labels	Source
most effectual	Degree=Sup		lexicographic
more effectual	Degree=Cmp		lexicographic
effectuall		alternative	lexicographic