Speculatively means to "size up a situation." If a bully is eying you, he is usually calculating the odds of making you do what he wants you to do.
"Sam watched Oscar speculatively, trying to figure out what he was doing."
"Joe eyed Susan's approach speculatively, since she had never talked to him before."
I won't speculate on what was discussed in that private meeting.
People have their own speculations, not all are the same.
You shouldn't speculate why you haven't heard from them, call them and ask them.
I hesitate to speculate on that unique piece of jewelry.
I speculate that you are trying to get someone to do your homework.
I hesitate to speculate on that unique piece of jewelry.
I can only speculate about the outcome of tomorrow's meeting.
Charles Goodnight was a great speculator who created a huge cattle ranching business.
Yes. Speculate is a valid Scrabble word.
Why do you speculate the obvious
you can't
"People often speculate the creation of the world as the answer is not fully known."
We should preserve nature and the environment. It was in his nature to be suspicious. Both astronomers and philosophers speculate on the nature of the universe.
The word speculate is a verb. The past tense form is speculated.