dishonest

a. 不诚实的
【法】 不忠实的, 不诚实的, 欺诈的

副词:dishonestly 

dis.hon.est

adj.（形容词）
Disposed to lie, cheat, defraud, or deceive.
说谎的、欺瞒的：有意撒谎、欺骗、诈骗或蒙蔽的
Resulting from or marked by a lack of honesty.
不诚实的；不正直的：由缺乏诚实而引起的，或以不正直为特征的

来源：
Middle English dishoneste [dishonorable]
中古英语 dishoneste [不名誉的，不光彩的，可耻的]
from Old French deshoneste
源自 古法语 deshoneste
probably from Medieval Latin *dishonestus
可能源自 中世纪拉丁语 *dishonestus
Latin dis- [dis-]
拉丁语 dis- [表示.不，相反.的意思]
Latin honestus [honorable] * see honest
拉丁语 honestus [荣誉的，诚实的] *参见 honest

【引伸】
dishon.estly
adv.（副词）
<参考词汇><同义词>dishonest,lying,untruthful,deceitful,mendaciousThese adjectives mean lacking honesty or truthfulness.
这些形容词都含有不诚实或不真实的意思。
Dishonest is the least specific:
Dishonest 是最普通的：
例句：
a dishonest answer;
不老实的回答；

例句：
a dishonest car dealer;
不诚实的汽车经营者；

例句：
dishonest profits.
不正当的获利。

Lying conveys a blunt accusation of untruth:
Lying 表达了对不真实性直言不讳的谴责：
例句：
Inconsistencies in his testimony made it obvious that he was a lying witness.
他证词不一致，很明显，他是一个撒谎的证人。

Untruthful is a softer but closely related term;it suggests both lack of veracity and divergence from fact:
Untruthful 是一个口气更温和而关系更密切的交情；该词既意味着缺乏真实，又意味着脱离事实：
例句：
made an untruthful statement.As experiments are completed the hypothesis seems increasingly untruthful.
做了不真实的叙述。实验结束后，这种假说好象增加了不真实性。

Deceitful implies misleading by falsehood or by concealment of the truth:
Deceitful 指由于欺骗或掩盖事实而使人迷惑的：
例句：
deceitful advertising;
骗人的广告；

例句：
a deceitful person.
欺骗的人。

Mendacious, a more formal equivalent oflying, suggests a chronic inclination toward untruth when it is applied to persons:
Mendacious 与lying 意思一样但更为正式，当用于指人时，含有有伪造、撒谎的习惯：
例句：
submitted a mendacious insurance claim.
上交了一份伪造的保险书。

例句：
Even when she is not being overtly mendacious,she tinkers with the truth.
即使当她不是公开撒谎时，她在事实的真相上也是笨拙的