This is the 4322nd most frequent Russian word.
безопасно
Safely.
The word "безопасное" is used as an adjective meaning 'safe', describing the quality of the place as it pertains to being non-dangerous.
Это место считается безопасным для прогулок.
This place is considered safe for walking.
The word "безопасно" serves as an adverb in this sentence, describing the manner in which the driver was driving.
Водитель ехал безопасно, соблюдая все правила.
The driver drove safely, following all the rules.
The word "безопасно" again acts as an adverb, indicating the method or manner of working to avoid danger.