To betray or go back on.
To cross twice in hybridization, as (A × B) × (C × D); for example, in commercial hybrid seed corn, A through D are classically inbreds, and their grandoffspring is the seed for sale.
To betray for money or other things.
To be sold.
To promote a particular viewpoint.
To work as a prostitute.
To promote a product or service.
To pretend that an opponent's blows or maneuvers are causing legitimate injury; to act.
To trick, cheat, or manipulate someone.
To transfer goods or provide services in exchange for money.
An act of selling; sale.
The promotion of an idea for acceptance.
An easy task.