This is the 584th most frequent Croatian word.
sad
The Croatian word "sad" means "now" in English.
Here 'sad' is used as an adverb meaning 'now', referencing the current time.
Sad idem u trgovinu.
Now I am going to the store.
In this sentence, 'sad' again functions as an adverb meaning 'now', to indicate a change in emotional state.
Bio sam tužan, ali sad sam sretan.
I was sad, but now I am happy.
Again, 'sad' is an adverb meaning 'now', used to show the current understanding or realization of the situation.