In an adjoining or adjacent manner; in a way that is joined or attached to something else.
From adjunct plus -ly (adverb suffix). This is a rare adverbial form emphasizing the physical or conceptual proximity or connection of things.
This is an extremely rare word—so rare that most modern dictionaries don't list it separately. It emphasizes that something is happening in close connection or proximity, almost in a 'right next to' manner.
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