dictate

An order or command.

I must obey the dictates of my conscience.

To order, command, control.

Trademark Owners will nevertheless try to dictate how their marks are to be represented, but dictionary publishers with spine can resist such pressure.

To speak in order for someone to write down the words.

She is dictating a letter to a stenographer.

The French teacher dictated a passage from Victor Hugo.

To determine or decisively affect.

He had offered, and been refused! There was that in her own nature, which sympathised with the pride, for such she held to be the motive, dictating the refusal.

Geology dictates the approximate location of the tunnel.