He knew that she did not speculate idly.

Heading out the door and down the hall toward the lobby, Drummond found himself idly speculating on what she'd be wearing.

He speculated idly upon the girl at his side.

I idly speculated on all the ramifications of this.

So, on this morning of the third day, he was comfortable and indolent, idly speculating what the future might bring, when the telephone's ringing interrupted.

At first, having noticed it, he speculated on it somewhat idly.

He sat idly speculating on which belonged to whom.

It's better to be busy than sit around idly speculating on what we can't change and better not interfere with.

He idly speculated about what Joan had shot with hers.

Vinory was speculating idly on the identity of her partner, because it didn't matter whom she liked.