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

1.
推測, 猜測
form a theory or conjecture about a subject without firm evidence
:
•
The police refused to speculate about the cause of the fire.
警方拒絕猜測火災原因。
•
We can only speculate on the future of the economy.
我們只能推測經濟的未來。