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தாக்குபவன் (thaakkubavan) Attacker.
The correct way would be 'a horse outruns an attacker', singlular horse, present tense.
With it's stinger, it strikes the attacker and releases venom into the attacker.
The stinger is left in the attacker and soon, it dies.
A Scorpion stings an attacker with paralyzing poison
In the Alchemist What story does the attacker tell Santiago