1. 轻松的：light-headed 头晕的 | light-hearted 轻松的 | light-heeled 脚步轻盈的
2. 轻松愉快的, 无忧无虑的：idealistic唯心论的, 空想主义的, 唯心主义者的 | light-hearted轻松愉快的, 无忧无虑的 | noncommittal不表示明确意见的, 不表态的;不承诺的;含糊的
3. 轻松愉快的：light-headed 头晕的 | light-hearted 轻松愉快的 | light-minded 轻薄的
4. 乐观：Depressive悲观 | Light-hearted乐观 | Active-Social好动
1. 轻松愉快的；无忧无虑的
Someone who is light-hearted is cheerful and happy.
e.g. They were light-hearted and prepared to enjoy life.
他们无忧无虑，随时准备享受生活。
2. 不严肃的；随便的；为了好玩的
Something that is light-hearted is intended to be entertaining or amusing, and not at all serious.
e.g. There have been many attempts, both light-hearted and serious, to locate the Loch Ness Monster.
有很多人或随意或认真地尝试过，想要找到尼斯湖水怪。
adj
1. carefree and happy and lighthearted
e.g. was loved for her blithe spirit
a merry blithesome nature
her lighthearted nature
trilling songs with a lightsome heart