This is the 17401st most frequent Polish word.
zareagować
"Zareagować" means "to react."
Here, 'zareagować' refers to responding or taking action towards a given situation.
Możesz zareagować na tę sytuację w różny sposób.
You can react to this situation in different ways.
'Zareagował' in this sentence shows a prompt response or action upon perceiving an event.
On szybko zareagował, kiedy zobaczył pożar.
He reacted quickly when he saw the fire.
The word here indicates deciding whether to respond to verbal stimuli or interaction.