speculated是什么意思？

In an interview with the Paris Review Hughes speculated that when a person puts pen to paper, "you meet the terrible resistance of what happened your first year at it, when you couldn't write at all".

She speculated that professors might try even harder to make classes interesting if they were to compete with the devices.

Naomi Pugh at Freed-Hardeman University speculated that professors would have to work harder to enliven their classes