afoot

On foot. (means of locomotion, walking)

Is it fit, let your mightyship say, / That I, like some pitiful flirt, / Should tarry within doors all day, / Or else trudge it afoot in the dirt?

"The dogs were no sooner let loose, than the hare was afoot.

On foot. (support of the body, standing)

In motion; in action; astir; stirring; in progress.

Hamlet: […]I prithee, when thou seest that act afoot, / Even with the very comment of thy soul / Observe mine uncle:[…]

Possibly some chemical experiment was afoot; possibly----Well, it was no business of mine to speculate upon why he wanted it.

That is on foot, in motion, in action, in progress.

Sunny moves through these final days quickly, easily, buoyed by routine even though change is afoot in all directions.

Now there are plans afoot to introduce a couple of extra trains to the timetable in December, with the long-term goal of a doubling of the service to eight trains a day.