This is the 115th most frequent Catalan word.
passar
"Passar" - to pass, to happen, to spend (time).
Here, 'passat' is used as the past participle form of 'passar', meaning 'to happen' or 'to occur'.
Què ha passat aquí?
What happened here?
In this case, 'passar' is used in the sense of 'to give' or 'to hand over' something to someone.
Pots passar-me la sal, si us plau?
Can you pass me the salt, please?
Here, 'passar' takes the meaning of 'to spend' as in spending time with someone or an activity.