to attack someone (especially verbally) unfairly in a deceitful, underhand, or treacherous manner, especially when they're not present in the place or situation that it happens. (as if stabbing them in the back). See backbite.
To attack verbally or physically; to annoy, bother.
To manage to gain access to.
To understand or ascertain by investigation.
To persuade by intimidation, to tamper with.
To begin working on or dealing with.
To contact someone.
To mean, signify.