This is the 474th most frequent Indonesian word.
tadi
"Tadi" means "earlier" or "just now."
In this sentence, 'tadi' specifies an earlier point during the same day, emphasizing a time that has recently passed, highlighted as "Earlier this morning".
Saya sudah membaca buku itu tadi pagi.
I already read that book earlier this morning.
Here, 'tadi' refers to a point within the previous evening, recently past the current time discussion, translated as "Last night".
Dia berkata hal itu tadi malam.
He said that last night.
In this context, 'tadi' marks an event from the immediate past, emphasizing a moment ago, as indicated in the question "just."