To offer (one's help or services).
To interrupt a conversation by introducing a different subject or making a comment.
To intervene in a dispute, or in a conversation.
To insert something (or oneself) between other things.
To be inserted between parts or things; to come between.
To contribute.
To call at (a place or port), especially as a deviation from an intended journey.
To apply, request, or submit.
To place inside.