accessory
//əkˈsɛsəri//
Noun
A supplementary item that adds to the beauty, convenience, or effectiveness of something else, especially a fashion item such as a belt, bag, jewelry, or scarf worn to complement clothing
She bought a new handbag and matching accessories for the party.
A person who helps another commit a crime or who knows about a crime and does not report it
He was charged as an accessory to the robbery.
An additional or extra item that enhances the functionality or appearance of a main product, such as computer peripherals or car accessories
I bought some accessories for my new laptop, including a wireless mouse and a carrying case.
Adjective
Contributing to or aiding in a secondary way; supplementary or subordinate
The research played an accessory role in the main project.
Involved in or associated with a crime without being the principal offender
He was charged with being accessory to the robbery.