speculate
US /ˈspek.jə.leɪt/
UK /ˈspek.jə.leɪt/

1.
推测, 猜测
form a theory or conjecture about a subject without firm evidence
:
•
The police refused to speculate about the cause of the fire.
警方拒绝猜测火灾原因。
•
We can only speculate on the future of the economy.
我们只能推测经济的未来。