This is the 673rd most frequent Arabic word.
مؤخرا
Recently.
The word 'مؤخرا' here emphasizes that the realization of the truth happened at a recent point in time.
عرفت الحقيقة مؤخرا فقط.
I only knew the truth recently.
Here, 'مؤخرا' (recently) is used as an adverb to indicate that the action of practicing running started in the recent past.
بدأت أتدرب على الجري مؤخرا.
I have started practicing running recently.
In this sentence, 'مؤخرا' is used to specify that the event of opening a new library occurred not long ago.