She preempted the last few pairs of limited-edition sneakers by buying them early.

preempted 是动词 preempt 的过去式。preempt 由前缀 pre-（表示"提前"）和动词 empt（来自拉丁语 emere，意为"拿取"）组成，字面意思是"提前拿走"。这个词引申为"抢先行动以阻止他人获得"或"先发制人"的意思。