Intervene
Part of speech: verb
Definition: To come between, or to be between, persons or things; -- followed by between; as, the Mediterranean intervenes between Europe and Africa. To occur, fall, or come between, points of time, or events; as, an instant intervened between the flash and the report; nothing intervened ( i. e., between the intention and the execution) to prevent the undertaking. To interpose; as, to intervene to settle a quarrel; get involved, so as to alter or hinder an action In a suit to which one has not been made a party, to put forward a defense of one's interest in the subject matter.
Example sentence: There are certain people I am allergic to. I even intervene when I don't like a customer; I rush in and check all the names. If I don't like them, I don't take them.
Interpose
Part of speech: verb
Definition: To insert something (or oneself) between other things.To interrupt a conversation by introducing a different subject or making a comment.To be inserted between parts or things.To intervene in a dispute, or in a conversation.