This is the 2986th most frequent Portuguese word.
sandra
"Sandra" is a proper noun, typically a feminine given name in Portuguese.
In this sentence, 'Sandra' is used as a proper noun referring to a person's name.
A Sandra comprou um livro interessante.
Sandra bought an interesting book.
Here, 'sandrou' is presented as a verb (hypothetically derived from the noun 'Sandra') to imply action, though it's not standard usage and could be an inventive use.
Ele sandrou seus planos ao último momento.
He disrupted his plans at the last moment.
In this case, 'sandra' is mentioned as the topic of discussion, treating it as a general term or object.