形容詞 dastardly:

1. treacherously cowardly- F.D. Roosevelt
   同義詞：dastard

1. I ask that the Congress declare that since the unprovoked and dastardly attack by Japan on Sunday December7,1941, a state of war has existed between the United States and the Japanese Empire.
   我要求國會(huì)宣布：由于日本在1941年12月7日星期日對我國無故進(jìn)行卑鄙的襲擊，美國同日本已經(jīng)處于戰(zhàn)爭狀態(tài)。

das.tard.ly

adj.（形容詞）
Cowardly and malicious; base.
卑怯的：膽小而惡毒的；卑鄙的

【引伸】
das.tardliness
n.（名詞）