preemptive

Undertaken or intended to deter or prevent an anticipated, usually unpleasant situation or occurrence.

Having the power to preempt or take precedence.

Relating to or being a bid in bridge at a high level that is intended to interfere with the opponents’ bidding.

Of or relating to preemption.

Made so as to deter an anticipated unpleasant situation.

Intended to interfere with an opponent‘s bidding.

designed or having the power to deter or prevent an anticipated situation or occurrence