名詞 tonic:

1. lime- or lemon-flavored carbonated water containing quinine
   同義詞：tonic water, quinine water
2. a sweet drink containing carbonated water and flavoring
   同義詞：pop, soda, soda pop, soda water
3. (music) the first note of a diatonic scale
   同義詞：keynote
4. a medicine that strengthens and invigorates
   同義詞：restorative

形容詞 tonic:

1. of or relating to or producing normal tone or tonus in muscles or tissue
2. employing variations in pitch to distinguish meanings of otherwise similar words
   同義詞：tonal
3. used of syllables
   同義詞：accented
4. relating to or being the keynote of a major or minor scale
5. imparting vitality and energy
   同義詞：bracing, brisk, energizing, energising, fresh, refreshing, refreshful

1. This tonic will work miracles for your depression.
   這種補藥對治療你的憂郁癥十分有效。
2. The good news acted as a tonic on us all.
   那個好消息讓我們大家歡欣鼓舞。
3. Praise can be a fine tonic.
   贊美有時真讓人感到振奮。
4. Sea air has a tonic quality.
   海洋的空氣有益于增進健康。