In a manner relating to or involving contact; from the perspective of contact or connection.
The adverbial form of 'contactual' created by adding '-ly' to the adjective. This word is extremely rare in modern English and appears mainly in specialized philosophical or linguistic contexts.
You'd rarely hear this word in real conversation—it's the kind of technical term that linguists invent but almost nobody uses, demonstrating how English allows us to create words even when we don't really need them.
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