This is the 438th most frequent Serbian word.
могла
"Могла" means "could" (feminine past tense form).
Here, 'могла' is used to express past ability or possibility for the action to occur.
Могла сам да те видим јуче на тргу.
I could have seen you yesterday at the square.
In this sentence, 'могла' is used to express conditional or polite suggestion about a future possibility.
Могла бих те посетити сутра ако будеш код куће.
I could visit you tomorrow if you are at home.
This usage of 'могла' indicates potentiality in the past for an action that might have occurred.