This is the 15593rd most frequent Polish word.
strzegą
"Strzegą" means "they guard" or "they protect" in English.
In this sentence, 'strzegą' is a verb in the present tense (third person plural) meaning 'they guard' or 'are guarding.' It describes an action undertaken by multiple subjects (the guards) in relation to the object, the castle.
Strażnicy strzegą zamku.
The guards are guarding the castle.
Here, 'strzegą' implies the act of protecting or defending something. It highlights the vigilance and activeness of the subjects (birds) in safeguarding their nests.
Ptaki strzegą swoich gniazd przed intruzami.
The birds protect their nests from intruders.
In this instance, 'strzegą' conveys a broader sense of ensuring or seeking to maintain the well-being or safety of someone else. It carries an emotional and nurturing connotation.