even think
There's no need to think about it, that's for sure!
— Бешеные псы (1992)
Да уж я и не знаю, право, что и думать-то?
Honestly, I really don’t know what to think.
— Ruthless Romance (1984)
I don’t know what to think.
Смотрю на твоё поведение и не знаю, что и думать.
I look at the way you're behaving and don't know what to think.