This is the 8055th most frequent Spanish word.
naut
"NAUT" is not a word in Spanish.
Here, 'naut' is part of the word 'astronauta', referring to someone who travels in space.
El astronauta exploró el vasto espacio exterior.
The astronaut explored the vast outer space.
Here, 'naut' forms part of 'aquanauta', denoting a person who explores underwater environments.
El aquanauta investigó las profundidades del océano durante semanas.
The aquanaut researched the depths of the ocean for weeks.
In this case, 'naut' appears in 'cosmonauta', implying a traveler in the cosmos.