likely

英 ['laɪklɪ] 美['laɪkli]

used to express disbelief of an account or excuse

［表示对陈述和借口的怀疑］编出来的吧，假的吧

‘She's your lodger? A likely story!’.
“她是你的房客？谁信啊？”。

probably

很可能

I won't take their pills, because as likely as not they'd poison me.
我才不吃他们的药呢，他们很有可能要毒死我。

(informal)certainly not; I refuse

(非正式)当然不，我不干

‘Are you going home?’ ‘Not likely!’.
“你要回家吗？”“当然不！”。