Tonic

English

Adjective

tonic

1. Restorative or invigorating.

   The arrival of the new members had a tonic effect on the team.

Noun

tonic

1. A drink intended to restore or invigorate.

   We used to brew a tonic from a particular kind of root.

2. tonic water
3. (music) The first note of a scale.
4. (music) The triad built on the tonic note.