inconceivable

1. ADJ If you describe something as inconceivable, you think it is very unlikely to happen or be true. 不可思議的

It was inconceivable to me that Toby could have been my attacker. 托比竟會(huì)是襲擊我的人，這對(duì)我來(lái)說(shuō)簡(jiǎn)直是匪夷所思。