sidekick
1 antonym for sidekick — opposites grouped by meaning.
Noun — A close companion or assistant, especially to a more prominent or important person.
Antonyms
How to use sidekick
The word patterns that sound natural to a native speaker.
Etymology
From "side" plus old slang "kick", meaning a front trouser pocket — considered the safest place to keep valuables, so a "sidekick" was one's closest, most trusted companion.
Full origin of sidekick →