In a manner that opposes or is against commercial interests or commercialism.
From 'anticommercial' plus '-ly' forming an adverb. Adverbs modify verbs, adjectives, or other adverbs to show how something is done.
When you add '-ly' to adjectives, you're describing how an action is performed—'anticommercially' means doing something in a way that deliberately rejects commercial values, which is pretty specific!
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