interpose

Etymology

From Middle French interposer, influenced by poser (“to place, put”), from Latin interpōnō, from inter (“between”) + pōnō (“to place, put”).

verb

1. (transitive) To insert something (or oneself) between other things.
   to interpose a screen between the eye and the light
2. (transitive) To interrupt a conversation by introducing a different subject or making a comment.
3. (transitive) To offer (one's help or services).
4. (intransitive) To be inserted between parts or things; to come between.
5. (intransitive) To intervene in a dispute, or in a conversation.