This is the 1142nd most frequent Portuguese word.
cascavel
Rattlesnake.
The word 'cascavel' refers to a rattlesnake, a type of snake.
Eu vi uma cascavel no deserto.
I saw a rattlesnake in the desert.
It again refers to the animal 'cascavel', emphasizing its warning behavior.
O som da cascavel avisou sobre sua presença.
The sound of the rattlesnake warned about its presence.
Here, 'cascavel' is part of a simile, describing speed and agility likened to a rattlesnake.