light-hearted

/L AY1 T AA0 R T AH0 D/
adjective
  1. 1

    Joyful, glad, taking pleasure in being alive; not depressed or sad.

    โ€œThe lighthearted young lovers ran over the hills.โ€

  2. 2

    Enjoyably lacking of seriousness, not grave.

    โ€œHis lighthearted banjo performance was appreciated because it relieved the tension in tight situations.โ€

Source: https://en.wiktionary.org/wiki/light-hearted, https://en.wiktionary.org/wiki/lighthearted