1.foresight n.远见，深谋远虑(prescience)

词根记忆：fore(预先)+sight(眼光)--有预见的眼光--远见

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

2.forestall v.预防，阻止(to prevent)

词根记忆：fore(预先)+stall(停止)--预先停止--预防

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

3.forfeit n.罚金(penalty)；v.丧失(to abandon, give up)

联想记忆：for(因为)+feit(看作fect“做”)--因为做了错事所以被罚--丧失

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

4.forge v.锻造(to form metal etc. by heating and hammering)；达成，使形成(to form or bring into being, especially by an expenditure of effort)；n.铁匠铺

联想记忆：forge和forget就差一个字母，忘了(forget)铁(t)就开始锻造(forge)

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

派生词:forger(n.伪造者)：forgery(n.伪造;赝品)

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)

词根记忆：form(形式)+at--固定的形式--格式，版式

例：Mannis Corporation has stored its archival(关于档案的)records in a computerized format.

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

词根记忆：form(形式)+at+ion--固定的形式--形成

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

同根词：formula(n.公式;信条)

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

联想记忆：for+mid(中间)+able。处在中间，左右为难--困难的

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)

词根记忆：form(形成，形状)+ula--结构式--公式

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

派生词:formulaic(a．公式的)

9.forthcoming a．将来的(approaching)；现成的，随要随到的(being about to appear or to be produced or made available)

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