for(wrongly)-feit(from L. facere; to make)
ex. His health was the forfeit he paid for overworking.
ex. Passengers who cancel their reservations will forfeit their deposit.
ex. to forfeit the right to inherit (2017 add)
forfeit的字源：1250–1300; ME forfet < OF (ptp. of forfaire to commit crime, to lose possession or right through a criminal act) < ML forīs factum penalty, ptp. of forīs facere to transgress, equiv. to L forīs outside, wrongly + facere to make, do
forfeit是由古法文而來的，其意思為"犯罪 to commit crime"或是"因為犯罪而喪失權利、財產"，字是拉丁文的 forīs(wrongly)-facere(to make)而來
forfeiture [forfeit-ure] n.沒收
v.鍛造 [to form by heating and hammering; beat into shape.]
ex. to forge a sword.
ex. Everything new comes from the forge(當名詞用) of hard and bitter struggle
v.偽造 [ to imitate (handwriting, a signature, etc.) fraudulently]
ex. forge an official document
n. 鐵匠鋪 [ the workshop of a blacksmith; smithy.]
n.鐵匠 [someone who operates a forge ]
n.偽造者 [someone who makes copies illegally ]
n.偽造罪 [the crime of falsely making or altering a writing by which the legal rights or obligations of another person are apparently affected]
v.放棄 [to give up, renounce, or resign.]
ex. I'll have to forgo my vacation in order to attend a summer Chinese course.
ex. The workers agreed to forgo a pay increase for the sake of greater job security.
forsake forsook forsaken [為了某種原因而拋棄]
v.拋棄 [ to quit or leave entirely; abandon; desert]
ex. He forsakes medicine to study literature.
forsake字源：O.E. forsacan "decline, refuse," from for- "completely" + sacan "to deny, refuse"
for the sake of somebody
for the sake of God
n.拘謹(簡單說就是大家很正式) [The quality or condition of being formal.]
ex. I wish we could treat each other without formality.
n.禮節(例如喪禮) [Rigorous or ceremonious adherence to established forms, rules]
ex. The level of formality determines the precise mode of expression.
n.構成,組成 [The act or process of forming something]
ex. Education has for its object the formation of character.
n.陣式 [A specified arrangement or deployment, as of troops.]
ex. CO is the formula for carbon monoxide.
ex. F1 : Formula One Grand Prix
adj.令人畏懼的 [Arousing fear, dread, or alarm]
ex. the formidable prospect of major surgery.
adj.難對付的 [Difficult to undertake, surmount, or defeat]
ex. a formidable challenge
ex. a formidable opponent.
ex. a formidable mathematical question
adj.直率的 [ going straight to the point; frank; direct; outspoken]
ex. It's sometimes difficult to be forthright and not give offense.
fort(strong from F.)-e
n.特長、長處 [ a strong point, as of a person; that in which one excels]
n. fencing中的劍較strong部分 [The strong part of a sword blade, between the middle and the hilt.]
In the sense of a person's strong point (He draws well, but sculpture is his forte), the older and historical pronunciation of forte is the one-syllable(音節) /fɔrt/
A two-syllable pronunciation /ˈfɔrteɪ/ is increasingly heard, especially from younger educated speakers, perhaps owing to confusion with the musical term forte, pronounced in English as /ˈfɔrteɪ/and in Italian as /ˈfɔrtɛ/. Both the one- and two-syllable pronunciations of forte are now considered standard.
v.增強,加強 [to make strong; impart strength or vigor to]
ex. A good breakfast will fortify you for the day's work.
ex. Good eating habits help to fortify the body against disease.
v.築堡壘於 [to protect or strengthen against attack; To strengthen and secure (a position) with fortifications. ]
ex. They decided to fortify the coastal areas.
n.堅忍;剛毅 [ Strength of mind that allows one to endure pain or adversity with courage.]
ex. For a moment father's fortitude was shaken.
ex. 南宋 文天祥