欢乐的英文：
gaiety
gladness
glee
merriment
pleasure
happy
joyous
gay

参考例句：

A flush of joy
一阵欢乐

Joy is the antithesis of sorrow.
欢乐是苦恼的对立面。

We partake in the general rejoicing.
我们分享共同的欢乐。

His songs are often expressive of joy and love.
他的歌曲经常表现欢乐与爱情。

This was the substance quite of all real earthly good and delight.
这是所有真正的人间幸福与欢乐的实质。

His songs are often expressive of joy and love
他的歌曲经常表现欢乐与爱情。

To observe(a day or event)with ceremonies of respect,festivity,or rejoicing.
庆祝用荣誉、节日或欢乐的庆典庆祝(一天或一个事件)

A fireplace lends coziness and cheer to a room.
壁炉给房间带来温暖舒适和欢乐的气氛。

Supercalifragilisticexpialidocious is a song from the 1964 Disney musical film Mary Poppins.
歌曲《难以置信》是1964年迪斯尼电影《欢乐满人间》中的一首配乐。

It was not money that lured the adolescent husBandman to the cities, But the gay life.
把那个青年农民引诱到城市的东西不是金钱，而是那里的欢乐生活。

gaiety是什么意思：
n. 愉快,快活,高兴

The colourful flags added to the gaiety of the occasion.
彩旗给这次盛会增添了欢乐的气氛.

He was dazzled by the gaiety and splendor of the metropolis.
大都市的花花世界使他感到眼花缭乱。

The gaiety of the streets and shops added to the festival celebration.
街道上和商店的欢乐景象渲染了节日的喜庆气氛。

gladness是什么意思：
n. 欢乐,欢喜,喜悦

a glad day, moment, etc
令人高兴的日子、 时刻等.

a glad May morning.
一个明媚喜人的五月的早晨

The wedding was on a glad day in may.
婚礼是在阳光明媚的一个五月天举行的。

glee是什么意思：
n. 欢欣；合唱曲

He was a charming mixture of glum and glee.
他是一个很有魅力的人，时而忧伤时而欢笑。

There was much glee among journalists over the leaked letter.
那封被泄密的信让记者们很是兴奋。

He was a charming mixture of glum and glee(Lillian Hellman)
他是一个很有魅力的人，时而忧伤时而欢笑(莉莲·赫尔曼)