tonic - noun

lime- or lemon-flavored carbonated water containing quinine

a sweet drink containing carbonated water and flavoring

(music) the first note of a diatonic scale

a medicine that strengthens and invigorates

tonic - adjective

• of or relating to or producing normal tone or tonus in muscles or tissue
• employing variations in pitch to distinguish meanings of otherwise similar words
• used of syllables
• relating to or being the keynote of a major or minor scale
• imparting vitality and energy

tonic - thesaurus

accented   bracing   brisk   fresh   keynote   pop   refreshful   refreshing   restorative   soda   tonal