This is the 168th most frequent Slovenian word.
posebej
"Posebej" means "especially" or "separately" in English.
Specifically, the word 'posebej' in this sentence emphasizes that the action of selecting the gift is intentionally directed or personalized for the addressed person.
To darilo je posebej izbrano zate.
This gift is specially chosen for you.
In this case, 'posebej' is used to emphasize the degree of happiness or satisfaction regarding the news.
Posebej so bili veseli te novice!
They were especially glad about this news!
Here, 'posebej' conveys the meaning of doing something individually or apart from others, indicating separation.