This is the 5454th most frequent Turkish word.
lakin
"However" or "but."
Here, 'lakin' is used as a conjunctive word equivalent to 'but', introducing a contrasting statement.
Bugün çok çalıştım, lakin istediğim sonucu alamadım.
I worked hard today, but I couldn't achieve the desired result.
In this sentence, 'lakin' serves to highlight a contrast between two situations: the crowd's excitement versus someone's calm demeanor.
Herkes çok heyecanlıydı, lakin o tamamen sakindi.
Everyone was very excited, but he was completely calm.
'Lakin' links two clauses with a concession or contrast between achieving a goal and the temporary nature of happiness.