tonic
[noun]
Synonyms: stimulant, boost, fillip, pick-me-up (informal), restorative, shot in the arm (informal)

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Contrasted words: debilitating, enfeebling, weakening, enervating, exhausting, grueling, sapping
Related Words: invigorating, refreshing, renewing, strengthening, bracing, sharp

[TahlilGaran] English Synonym Dictionary ▲

ton‧ic /ˈtɒnɪk $ ˈtɑː-/ noun
[Date: 1600-1700; Language: Greek; Origin: tonikos, from tonos; ⇒ tone¹]

1. [uncountable and countable] (also ˈtonic ˌwater) a clear bitter-tasting drink that you can mix with alcoholic drinks such as gin or vodka:
She sat and sipped a gin and tonic.

2. [countable] a drink that you have as a medicine to give you more energy or strength when you feel tired:
A lot of people need a tonic at the end of the winter.

3. [countable usually singular] British English something that makes you feel happy and full of energy:
A weekend by the sea was the perfect tonic.

4. [countable] a liquid that you put on your hair or skin to improve it and make it more healthy:
a herbal skin tonic

5. [countable usually singular] technical the first note in a musical scale of eight notes

[TahlilGaran] Dictionary of Contemporary English ▲