In a manner that produces the intended effect; successfully and adequately; with real results.
From 'effectual' plus the adverbial suffix '-ly.' Meaning: in a way that is effectual or producing real effects.
The adverbial form emphasizes manner and real-world outcomes. When something works 'effectually,' it's not just going through the motions—it's genuinely creating the change intended, which is why formal writing prefers it over simple 'effectively.'
Complete word intelligence in one call. Free tier — 50 lookups/day.