adv. 事先,預先;提前;
adj. 提前的;預先準備好的;
?? before(ad. 在前面)+hand→ 預先
"It is reasonable to assume that he knew beforehand that this would happen."
有理由認為他事先就知道會發生這樣的事。
近義:heretofore, once, prematurely, previously, rather, thereinbefore
反義:later, posthumously, thereafter, thereinafter, ulteriorly, afterward