This is the 5071st most frequent Portuguese word.
mecânico
"Mechanic" - a person skilled in repairing and maintaining machinery.
Here, 'mecânico' refers to a profession, specifically someone skilled in repairing machines.
O mecânico consertou o carro rapidamente.
The mechanic repaired the car quickly.
In this sentence, 'mecânico' is used as an adjective describing a system that operates mechanically.
Ele aprendeu a operar o sistema mecânico da fábrica.
He learned to operate the mechanical system of the factory.
Here, 'mecânico' is again used as an adjective, this time to describe the nature of movement as being mechanical.