At the medieval fair, she was acting the jennet, imitating the low, ambling gait and dignified carriage of the small Spanish horse.

The kids would act the jennet all afternoon, shouting and knocking over chairs.

Don't act the maggot during the meeting; people need to concentrate.

When the boss stepped out, the interns began to act the goat in the office.

The self-acting valve closed when the pressure dropped, preventing a dangerous leak.

Clinicians preferred the faster-acting medication because it relieved symptoms sooner.

The fast-acting pain reliever reduced my headache within minutes.

Of all the cold medicines on the shelf, this one is the fastest-acting for easing congestion.

We switched to a slower-acting fertilizer to avoid shocking the young plants.

Among the medications we tested, this was the slowest-acting, producing noticeable effects only after several days.