The antonyms for the term "more down-in-the-mouth" include cheerful, optimistic, buoyant, effervescent, and vivacious. The word "down-in-the-mouth" refers to a feeling of sadness or depression, so antonyms would indicate opposite moods and emotions. Cheerful individuals exude happiness, while optimistic people have a positive outlook on life. Buoyant personalities are marked by their resilience and ability to rebound quickly from setbacks. Effervescent people are full of energy and verve, while vivacious individuals are outgoing and lively. As such, individuals who embody these antonyms can help those feeling down-in-the-mouth to feel more inspired, hopeful, and joyful.