Producing or capable of producing a strong, noticeable effect or impression; powerful and impactful.
Formed from 'effect' (result) plus the suffix '-ful' (full of). The construction literally means 'full of effects' or 'producing effects abundantly.'
This word is particularly interesting in Renaissance literature and theater, where 'effectful' writing meant prose or scenes designed to have maximum emotional or dramatic impact on an audience—essentially, early audience psychology.
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