noun
ruse
ROOZ/ruːz/
A trick intended to deceive someone.
The empty box behind the curtain is part of a ruse.

Etymology
The Old French word joined evasive movement with trickery. English initially used it for a hunted animal’s dodging movements, before broadening it to a deceptive trick or strategy.
In context
they bring him in under the ruse of a grant but then he realizes that this is not like some Grant application interview
More examples
- She pretends to lose her keys as a ruse to delay our departure.
- His offer to help is a ruse to gain access to the files.
- Their elaborate ruses fool no one.
Forms
ruse · ruses
deception noun — The act of misleading or fooling someone.