This is the 946th most frequent Arabic word.
بخصوص
"Regarding" or "concerning."
In this sentence, 'بخصوص' is used to specify the topic of discussion, 'the new project'.
تحدثنا يوم أمس بخصوص المشروع الجديد.
We talked yesterday regarding the new project.
Here, 'بخصوص' introduces the subject of the received message, which is 'tomorrow's meeting'.
وصلتني رسالة مهمة بخصوص اجتماع الغد.
I received an important message regarding tomorrow's meeting.
In this example, 'بخصوص' is used to inquire about information related to 'the upcoming trip'.