concealedtrigger
nounUK /kənˈsiːld ˈtrɪɡə/
US /kənˈsiːld ˈtrɪɡər/
A hidden button or switch that makes something happen when you press it.
The spy found the concealed trigger under the desk and opened the secret door.
OTHER MEANINGS
2. A hidden cause that suddenly makes a strong feeling or reaction start.
The loud noise was a concealed trigger for his bad memories.
3. A secret reason that makes a plan or event begin.
Nobody knew the concealed trigger behind the sudden change in the game.
4. A hidden part in a toy or machine that starts its action.
The robot's concealed trigger was a tiny button on its back.