To hint; to suggest tacitly (usually something bad) while avoiding a direct statement.
To creep, wind, or flow into; to enter gently, slowly, or imperceptibly, as into crevices.
To ingratiate; to obtain access to or introduce something by subtle, cunning or artful means.
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 offer (one's help or services).