| fraud | n.詐欺,騙術,不合法的行為 =deception=seam |
| fret | v.焦慮,煩躁 =worry=agonize |
| fringe | n.邊緣,外緣 =brim=brink |
| frivolous | adj.輕率的,輕薄的 =rash=indiscreet |
| frugal | adj.節約的,節儉的 =plain=thrifty |
| fugitive | n..逃亡者,逃犯 =escapee=absconder adj.逃亡的,逃跑的=escaped=runaway |
| funnel | v.集中,注入 =direct=channel n.漏斗=conduit=tube |
| furbish | v.更新 =reform=renew |
| furtive | adj.偷偷的,鬼祟的 =sly=stealthy |
| garb | n.服裝,打扮 =apparel=attire |