In a manner that serves the purpose of annotation; in a way characterized by adding explanatory notes or clarifications.
From 'annotative' (adjective form) plus the adverb suffix '-ly,' which converts adjectives to adverbs indicating manner. This creates a formal, technical term used primarily in academic discourse.
When something is done 'annotatively,' it means you're explaining as you go—the word itself contains the idea of layering information on top of a base, which is how human understanding actually works: foundations first, then explanations stacked on top.
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