Stratagem (noun)

1. A clever scheme or plan for achieving a specific goal or objective.
2. A trick or maneuver used to deceive or outmaneuver an opponent.

Origin:

From the greek word "stratagema" which means "a general plan of action".

Examples:

1. The company used a clever stratagem to win the contract.
2. He used a stratagem to outsmart his opponents.
3. The enemy's stratagem was to divide and conquer.
4. The general's stratagem was to feign weakness to draw the enemy into an ambush.
5. The chess player used a stratagem to trap his opponent's king.