reckon without something
phrasal verb with reckon verb uk/ˈrek.ən/ us/ˈrek.ən/
UK
没有考虑到;对…未加考虑
to fail to think about something when you are making plans and therefore not be prepared to deal with it
We'd expected a two-hour drive but had reckoned without the rain. 我们原来预计开车两个小时就到了，可没有料到会下雨。