This is the 2603rd most frequent Polish word.
trwa
"Trwa" means "lasts" or "continues" in English.
In this sentence, 'trwa' is used as the third-person singular present tense form of the verb 'trwać', meaning 'to last' or 'to continue'. It describes the ongoing duration of an event.
To wydarzenie trwa już kilka godzin.
This event has been lasting for a few hours.
Here, 'trwa' is similarly used to denote the ongoing process or duration of the activity of constructing the bridge.
Budowa tego mostu trwa bardzo długo.
The construction of this bridge is taking a very long time.
In this case, the word 'trwałość', derived from the verb 'trwać', is a noun meaning 'durability'. It refers to the enduring nature or lifespan of the material.