This is the 6th most frequent Serbian word.
а
The Serbian word "а" means "and," "but," or "while," depending on context.
Here, 'а' is used as a conjunction to compare or contrast two thoughts.
Ја волим кафу, а ти чај.
I like coffee, and you like tea.
In this context, 'а' is used as a conjunction to denote contradiction from expectations.
Мислио сам да ће доћи, а он није дошао.
I thought he would come, but he did not come.
Here, 'а' serves as a coordinating conjunction, adding more information to the initial statement.