Placing something between two things; inserting oneself into a conversation or situation, often to mediate or interrupt.
From Old French 'interposer,' composed of Latin 'inter-' (between) and 'ponere' (to place). Entered English in the 16th century with both the physical and metaphorical meanings.
When someone is 'interposing' themselves, they're literally putting their body or voice between two other things—which is why the word describes both a referee stepping between fighters and a person inserting an objection into a conversation.
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