"Pugnacious'' means eager or quick to argue or fight. It's derived from the Latin "pugnare'' meaning "to fight''.
Step 1: Understand the options:
- "Talented'': refers to having skill — unrelated to combativeness.
- "Mediocre'': means average — not a synonym.
- "Aggressive'': means inclined to fight or attack — a synonym.
- "Impulsive'': means acting without thought — may overlap slightly, but not a direct match.
Therefore, the correct synonym for "pugnacious'' is "aggressive''.