preclude
v.
1610s, from Latin praecludere "to close, shut off; hinder, impede," from prae- "before, ahead" (see pre-) + claudere "to shut" (see close, v.). Related: Precluded; precluding.
〔蒋〕[pre-前，先，预先，clud关闭；“预先关闭”] 阻止，预防，排除，消除
〔李〕[pre-=beforehand 事先；clud=to shut 关闭；-e→“to shut beforehand in order to keep out事先关闭不让进入”→] v.① prevent免除，预防