To respond in advance
An anticipatory response to expected changes in the environment of a system
To anticipate, to act foreseeingly.
To obstruct or stop up, as a road; to stop the passage of a highway; to intercept on the road, as goods on the way to market.
To preclude or bar from happening, render impossible.
To prevent, delay or hinder something by taking precautionary or anticipatory measures; to avert.
To deprive (with of).
Something situated or placed in front.