This is the 15511th most frequent Polish word.
stabilny
Stable.
Here 'stabilny' is used as an adjective to describe the structural integrity of a bridge.
Ten most jest bardzo stabilny i wytrzyma silne wiatry.
This bridge is very stable and will withstand strong winds.
In this case, 'stabilny' refers to the consistent and reliable functioning of a system, common in technological contexts.
Mam nadzieję, że ten nowy system będzie stabilny i niezawodny.
I hope this new system will be stable and reliable.
Here, 'stabilny' is applied metaphorically to describe a state of emotional balance or mental health.