closingblow
nounUK /ˈkləʊzɪŋ bləʊ/
US /ˈkloʊzɪŋ bloʊ/
The last hit that ends a fight.
The knight gave the closingblow and the battle was over.
OTHER MEANINGS
2. The final action that ends an argument or contest.
Her clever question was the closingblow to the debate.
3. The last event that finishes a long struggle.
The new law was the closingblow to the old rules.
4. A hit that makes someone unable to continue.
The boxer's closingblow won him the match.