tiller

"The Welsh government's hand was on the tiller and they should have made sure that this had been dealt with much more effectively and much more swiftly."

It would have worked if supply and demand were holding the tiller.

“All of our greatest moments from the past 20 years have come with Adrian’s hand on the technical tiller,” Red Bull team principal Christian Horner said.

The captain managed to use the nose wheel tiller to keep the plane near the runway centerline until the pedals unstuck.

Bioturbators, often referred to as 'tillers of the soil', play an important role in determining nutrient availability and providing food and shelter for many species.