This is the 679th most frequent Portuguese word.
cada
"Cada" means "each" or "every" in English.
In this sentence, 'cada' is used as a determiner to indicate 'each' as an individual member of a group.
Cada pessoa tem suas próprias opiniões.
Each person has their own opinions.
Here, 'cada' functions similarly as a determiner, emphasizing every single unit within the total group.
Ela estuda cada capítulo antes do exame.
She studies each chapter before the exam.
In this context, 'cada' is used as part of the expression 'cada vez', meaning 'every time', indicating the occurrence of the action whenever the condition happens.