名詞 decoy:

1. a beguiler who leads someone into danger (usually as part of a plot)
   同義詞：steerer
2. something used to lure victims into danger
   同義詞：bait, lure

動詞 decoy:

1. lure or entrap with or as if with a decoy

1. He succeeded in decoying the ducks toward his blind.
   他成功地把野鴨引誘到他的隱藏處。
2. He was decoyed by a false message into enemy territory.
   他被假情報誘騙進(jìn)入敵區(qū)。
3. The boy always decoyed his friends.
   那個男孩經(jīng)常欺騙他的朋友。

de.coy

n.（名詞）

A living or artificial bird or other animal used to entice game into a trap or within shooting range.
誘鳥，誘餌：用來把獵物誘捕入陷阱或誘捕入射擊范圍的活的或假的鳥或其它動物
An enclosed place, such as a pond, into which wildfowl are lured for capture.
圈套：圍起來的地方，如池塘，可把野雞誘捕在里面
A means used to mislead or lead into danger.
誘捕：一種手段，用以把…引入危險的境地
v.tr.（及物動詞）
de.coyed,de.coy.ing,de.coys[d-koi.]
To lure or entrap by or as if by a decoy.See Synonyms at lure
誘捕：用誘餌吸引或設(shè)陷阱參見 lure

來源：
Possibly from Dutch de kooi [the cage]
可能源自 荷蘭語 de kooi [籠子]
de [the] from Middle Dutch * see to-
de [這] 源自 中古荷蘭語 *參見 to-
kooi [cage] from Middle Dutch côie from Latin cavea
kooi [籠子] 源自 中古荷蘭語 côie 源自 拉丁語 cavea

【引伸】
decoy.er
n.（名詞）