What is the core lexico-grammatical meaning and primary syntactic function of the preposition?

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Lexico-grammatical meaning of "relations (of substances)" and function as a linking word indicating syntactic relations.

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Lexico-grammatical meaning of "substance" and function as a subject/object.

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Lexico-grammatical meaning of "action/process" and function as a predicate.

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Lexico-grammatical meaning of "quality" and function as an attribute.

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