This is the 13198th most frequent Spanish word.
proceder
To proceed or to behave/conduct oneself.
Here, 'proceder' is used as a verb meaning 'to proceed'.
Es importante proceder con precaución en situaciones desconocidas.
It is important to proceed with caution in unknown situations.
In this case, 'proceder' is used as a noun meaning 'conduct' or 'manner of acting'.
Su proceder durante la reunión fue muy profesional.
His conduct during the meeting was very professional.
In this sentence, 'proceder' refers to the legal process or sequence of actions.