This is the 12829th most frequent Spanish word.
oxidada
Rusty.
Here, 'oxidada' is used as an adjective describing the state of the bicycle, indicating it is affected by rust.
La bicicleta que encontré en el parque estaba oxidada.
The bicycle I found in the park was rusted.
In this sentence, 'oxidada' metaphorically describes a person's skill or ability as diminished or out of practice.
Su memoria para los nombres parece oxidada tras tantos años.
Her memory for names seems rusty after so many years.
Here, 'oxidado' (male form of 'oxidada') again describes the metal state of an object, showing how rust has impeded its function.