In a circumambient manner; in a way that surrounds or encircles on all sides.
From 'circumambient' (surrounding all around) + '-ly' (adverb suffix). This rare adverb form appears mainly in archaic or highly formal literary contexts.
When you form adverbs from rare adjectives, you get words like 'circumambiently'—technically correct but so cumbersome that almost nobody uses them. It's an example of English grammar running faster than actual usage.
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