Learn how to say Preemptively correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word pre-emptive:
serving or intended to pre-empt or forestall something, especially to prevent attack by disabling the enemy:
a pre-emptive strike
relating to the purchase of goods or shares by one person or party before the opportunity is offered to others:
Bridge denoting a bid, typically an opening bid, intended to be so high that it prevents or interferes with effective bidding by the opponents.