noun

sidekick

SYDE-kik/ˈsaɪdkɪk/

A close companion or helper to a more prominent person.

The mechanic's sidekick holds the work light and keeps tools ready.

A bicycle mechanic repairs a rear brake while his close assistant crouches shoulder-to-shoulder beside him, directing a work light onto the repair and keeping an open tool tray ready.

Etymology

Sidekick is recorded as American English for a companion or close associate, but the significance of its formation is uncertain. Earlier terms side-pal and side-partner show a similar naming pattern without explaining kick.

In context

Old Time Radio Researchers25:24

when hoppy and his sidekick go after snakes whether they be murderers or a mine filled with rattlers you can be sure that a snake of any kind is no match for them

Hopalong Cassidy - The Secret in the Hill

More examples

The hero and his sidekick entered the cave.
Her longtime sidekick helped organize the show.
Several comic sidekicks appear in the series.

Forms

sidekick · sidekicks

Similar words

companion: Companion need not play a supporting role.
assistant: Assistant may have a formal job rather than personal closeness.