In an added or additionally stated manner; furthermore; moreover.
From 'added' (past tense of 'add,' from Latin 'addere') + '-ly' (forming adverbs). This rare adverb form emerged to mean 'in an adding manner' or 'as an addition to what was said.'
Addedly is so rare that most modern dictionaries don't even list it—it's like finding a dinosaur egg in your backyard! It represents how English used to add '-ly' to almost any adjective, but now we prefer 'additionally' instead.
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