This is the 3076th most frequent Spanish word.
mar
"Mar" means "sea."
Here, 'mar' is used as a singular noun referring to the sea, or the large body of saltwater.
Me gusta pasear por la orilla del mar.
I like to walk along the shore of the sea.
In this case, 'mar' refers to the habitat and ecosystem associated with the sea.
La vida en el mar puede ser muy diversa.
Life in the sea can be very diverse.
Here, 'mar' symbolizes an ideal place where one finds peace and comfort.