VERB
抢先行动；预先制止；先发制人
If you pre-empt an action, you prevent it from happening by doing something which makes it unnecessary or impossible.
例句
You can pre-empt pain by taking a painkiller at the first warning sign...
刚出现征兆时，就服用止痛片来预防疼痛。
He pre-empted any decision to sack him...
他预先阻止了所有解雇他的决定。