sniffing
X-ray is an action. It begins with the letter x.
Identify and install are action verbs. Implement and injure are verbs.
falling action
Quake
Events that happened before the play begins. something that happened before the play begins.
billowbisectbirdwatchingbicyclingbitbitebickerbifurcatebingebill (as in to bill for services)
activate
Jump Ball
the event that begins the story's action
take(s)
something that happened before the play begins. or An action understood to have happened in the past.