underhand

音标发音

It is obscure because it is underhand.
它不公開，因爲它是在地下進行的。
And Madrid is not the only city accused of underhand tactics in fending off financial sanctions.
馬德裡還不是唯一因採取欺騙手法來避開財政制裁而被指控的城市。
But while it is one thing to profit from others' misjudgments if they are making them anyway, any suggestion that he profited in an underhand way will tarnish him.
但是，獲利於別人的判斷失誤是一廻事（如果他們本來就在犯錯的話），可任何有關他用狡詐手法獲利的說法，都將損害他的形象。
blog.sina.com.cn

What I was going to say is that you could, at least theoretically, strike with your spear in a overhand manner or you could strike with it in an underhand manner, the only thing is I don't know how you do that underhand when you're in the middle of a phalanx.
我要說的是,士兵們能夠,至少從理論上來說,可以自上而下地刺矛,也可以這樣自下而上地刺矛,我不太清楚在方陣中,士兵們怎麽能夠自下而上地刺矛
耶魯公開課 - 古希臘歷史簡介課程節選

On the other, they can plausibly distance themselves from the more underhand attacks on their opponents.
ECONOMIST: The mid-term mud starts to fly
She hints at underhand, possibly criminal, dealings between former INDEC staff, independent Argentine economists and international financiers.
ECONOMIST: Argentina’s inflation problem
What he saw, down the first base line, was left-handed pitcher Cat Osterman working on her wicked windmill underhand delivery.
NPR: Women's Softball On Olympic Chopping Block

If an action is underhand or if it is done in an underhand way, it is done secretly and dishonestly.
You use underhand or underhanded to describe actions, such as throwing a ball, in which you do not raise your arm above your shoulder.
Underhand is also an adverb.