1.foresight n.遠見，深謀遠慮(prescience)

詞根記憶：fore(預先)+sight(眼光)--有預見的眼光--遠見

例：The treasurer had the foresight to sell the company stocks right before the market crashed.

2.forestall v.預防，阻止(to prevent)

詞根記憶：fore(預先)+stall(停止)--預先停止--預防

例：Treatment for hypertension forestalls certain medical expenses by preventing strokes and heart disease.

3.forfeit n.罰金(penalty)；v.喪失(to abandon, give up)

聯想記憶：for(因為)+feit(看作fect“做”)--因為做了錯事所以被罰--喪失

例：Increasing commercial activity would cause some people to forfeit their liberty and virtue.

4.forge v.鍛造(to form metal etc. by heating and hammering)；達成，使形成(to form or bring into being, especially by an expenditure of effort)；n.鐵匠鋪

聯想記憶：forge和forget就差一個字母，忘了(forget)鐵(t)就開始鍛造(forge)

例：The blacksmith forged horseshoes from iron.//forged in battle

派生詞:forger(n.偽造者)：forgery(n.偽造;贗品)

5.format n.格式，版式(the shape, size, and general makeup of something printed)；v.（使）格式化(to prepare, usu. as a computer disk, for storing data in a particular format)

詞根記憶：form(形式)+at--固定的形式--格式，版式

例：Mannis Corporation has stored its archival(關于檔案的)records in a computerized format.

6.formation n.組織，形成(thing that is formed)；（軍隊）編隊(an arrangement of a group of persons in some prescribed manner or for a particular purpose)

詞根記憶：form(形式)+at+ion--固定的形式--形成

例：It misrepresented how horizontal displacements cause the formation of mountain chains.

同根詞：formula(n.公式;信條)

7.formidable a．可怕的(causing fear, dread, or apprehension)；困難的(having qualities that discourage approach or attack)

聯想記憶：for+mid(中間)+able。處在中間，左右為難--困難的

例：In the speaking contest Randolph faced formidable obstacles.

8.formula n.公式(a statement, especially an equation, of a fact, rule, principle, or other logical relation)

詞根記憶：form(形成，形狀)+ula--結構式--公式

例：In the formula, integers(整數) ’’p" and "t" are positive constants.

派生詞:formulaic(a．公式的)

9.forthcoming a．將來的(approaching)；現成的，隨要隨到的(being about to appear or to be produced or made available)

例：Bill and Anne eagerly awaited their forthcoming wedding.//No answer was forthcoming.