dubious 怀疑的 doubtful
The dubious employees shook their heads as  they carried out the order.
skeptical 怀疑的 dubious, incredulous
The skeptical student refused to accept the  theory of evolution.
suspicion 怀疑 doubt, distrust
suspicious 可疑的 猜疑的 dubious, fishy
Aunt Jane was suspicious of everyone who  came to her front door.
fishy 值得怀疑的 suspicious, dubious
Are you telling the truth? Your story  sounds fishy to me.
incredulity 怀疑 suspicion, disbelief
misgiving 疑惧 疑虑
poise 犹疑
halt 踌躇 停止
The police ordered the thief to halt.
scruple 踌躇 顾忌 hesitation,  scrupulousness
She wouldn't cruple to tell a lie if she  thought it would be useful.
flounder 踌躇 (比目鱼)
demur 踌躇
Anne demur at the statement that she  assigned too much homework.
hesitate 踌躇犹豫 含糊 falter, vacillate
John hesitated when I asked him to help me  move some furniture.
doubt 怀疑 suspect
After he lost the game, Bill had doubts  about his athletic ability.
suspect 怀疑
I suspect his motives.