noun / adjective
tonic
TAH-nik/ˈtɑːnɪk/
A preparation believed to restore vigor.
A tired adult takes a tonic before returning to everyday activities.

Etymology
The Greek idea of stretching became bodily tension or healthy muscular firmness. A tonic was therefore a remedy thought to restore that firmness, and more broadly to renew strength or energy.
In context
The Rexel Drug Company starts marketing something called Americanitis Elixir, a tonic specifically designed to soothe your neurosthenic symptoms. Patent medicines flood the market. All promising to restore your depleted nerve energy
More examples
- The label describes the herbal tonic as a remedy for fatigue.
- These tonics were once sold to people recovering from illness.
- She doubts the drink has any tonic effect.
Forms
tonic · tonics
Similar words
- restorative
- Also suggests renewed strength, but need not be a preparation.
- remedy
- Treats a particular problem rather than generally restoring strength.