This is the 5217th most frequent Arabic word.
بلا
"بلا" means "without" or "no."
In this sentence, 'بلا' is used as a preposition meaning 'without' to eliminate the presence of 'شك' (doubt).
هو قادرٌ على القيام بذلك بلا أي شك.
He is capable of doing that without any doubt.
Here, 'بلا' indicates proceeding without performing the action 'توقف' (stopping).
مررتُ بالطريق بلا توقف.
I passed through the road without stopping.
In this example, 'بلا' is used to describe a state of absence regarding 'قلق' (worries).