名詞 foil:

1. a piece of thin and flexible sheet metal
2. anything that serves by contrast to call attention to another thing's good qualities
   同義詞：enhancer
3. a device consisting of a flat or curved piece (as a metal plate) so that its surface reacts to the water it is passing through
   同義詞：hydrofoil
4. picture consisting of a positive photograph or drawing on a transparent base; viewed with a projector
   同義詞：transparency
5. a light slender flexible sword tipped by a button

動詞 foil:

1. enhance by contrast
2. hinder or prevent (the efforts, plans, or desires) of
   同義詞：thwart, queer, spoil, scotch, cross, frustrate, baffle, bilk
3. cover or back with foil

1. Our foil packets seal the flavour in.
   我們用錫紙包裝以保持原味。
2. Wrapping aluminium foil round a joint allows the meat to cook in its own juice/juices.
   用鋁箔把肉包住使之在原汁中烹制。
3. Aluminum foil can be used for wrapping food.
   鋁箔用于包裝食物。
4. This box of chocolate was wrapped round with foil.
   這盒巧克力用箔紙包著。

foil

v.tr.（及物動詞）
foiled,foil.ing,foils
To prevent from being successful; thwart.See Synonyms at frustrate
使失?。悍恋K成功；阻撓參見 frustrate
To obscure or confuse (a trail or scent) so as to evade pursuers.
攪亂痕跡：使（痕跡或氣味）模糊難辨以躲避追擊者
n.Archaic （名詞）【古語】
A repulse; a setback.
阻力；挫折
The trail or scent of an animal.
動物留下的痕跡或氣味

來源：
Middle English foilen [to trample, defile]
中古英語 foilen [踐踏，弄臟]
variant of filen [to defile] * see file 3
filen的變體 [玷污] *參見 file3

foil
foil 2

n.（名詞）
A thin, flexible leaf or sheet of metal:
箔：一頁或一張薄而軟的金屬：
例句：
aluminum foil.
鋁箔

A thin layer of polished metal placed under a displayed gem to lend it brilliance.
襯箔：在展出的寶石下放置的用以襯出其光澤的薄層剖光金屬
One that by contrast underscores or enhances the distinctive characteristics of another:
陪襯物：在對比中增加或減少其它物體特色的陪襯物：
例句：
.I am resolved my husband shall not be a rival, but a foil to me.(Charlotte Brontô)
.我決定不把我丈夫當(dāng)成敵手而把他當(dāng)成我的陪襯.(夏洛特·勃朗特)

The reflective metal coating on the back of a glass mirror.
銀箔：鏡子背面的反射金屬覆蓋面
Architecture A curvilinear, often lobelike figure or space formed between the cusps of intersecting arcs, found especially in Gothic tracery and Moorish ornament.
【建筑學(xué)】 葉形飾：在尖頂?shù)慕徊婀伴T之間的一塊曲線的、常為裂片狀的空間，在哥特式的窗花格交織線條和馬蹄型拱的裝飾上尤為多見

An airfoil.
飛翼
Nautical A hydrofoil.
【航?！?/i> 水翼艇
v.tr.（及物動詞）
foiled,foil.ing,foils
To cover or back with foil.
以箔覆蓋或襯托
To set off by contrast.
通過對比襯托

來源：
Middle English
中古英語
from Old French foille
源自 古法語 foille
from Latin folia [pl. of] folium [leaf] * see bhel- 3
源自 拉丁語 folia [] folium的復(fù)數(shù) [葉] *參見 bhel- 3

foil
foil 3

n.（名詞）
A fencing sword having a usually circular guard and a thin, flexible four-sided blade with a button on the tip to prevent injury.
鈍頭劍，無鋒劍：帶有一環(huán)狀保護裝置和在頂端帶有圓頭以防止劍傷的四邊劍鋒的防御劍
Often foils The art or sport of fencing with such a sword:
常作 foils 花劍劍術(shù)：用圓頭劍防御的技巧或運動：
例句：
a contest at foils.
花劍比賽

來源：
[Origin unknown]
[詞源不明]