Pinyin [[lè ][ yuè ][ yào ][ lào]]

? It shows that its original meaning is stringed instrument, and its extension refers to pleasure, pleasure and so on. The source of the book of songs, Chen Feng, Hengmen, which was anonymous in the pre-Qin period: secretion can be hungry.

Synonyms are laughter, joy and happiness.

The antonyms are sadness, sadness, sadness, bitterness and sadness.

Music word formation

Music brings sadness, instrumental music, folk music, military music, living and working in peace and contentment, helping others, heaven, optimism, band, vocal music, music theory, joy, music, music.

optimistic

Pinyin [lè guān]

It shows that you are cheerful and full of confidence in the development of things (as opposed to "pessimism")

Source Yu's Preface to Sending Wang Xiucai: "Since Confucius is absent, all disciples have books, only Monk family stories, so I am widowed and optimistic."