This is the 309th most frequent Catalan word.
quedat
"Quedat" in Catalan means "stayed" or "remained."
Here, 'quedat' is used as the past participle of the verb 'quedar-se', meaning 'to stay' in a reflexive sense. It describes a completed action.
Ell s'ha quedat a casa avui perquè no se sent bé.
He has stayed home today because he doesn't feel well.
In this case, 'quedat' is part of the reflexive verb 'quedar-se' and is used metaphorically to mean 'to retain or recall information'.
No t'has quedat amb res del que he explicat?
Haven't you remembered anything from what I explained?
Here, 'quedat' is part of an idiomatic expression 'quedar-se impressionat', which means 'to be impressed' and indicates a subjective emotional state.