joyous   adj. 

full of joy; very happy 非常快乐的，令人愉快的

She had made their childhood so joyous and carefree.

她让他们的童年无忧无虑，充满欢乐。

tension   n. 

a feeling of nervousness before an important or difficult event 

同根词：tense adj.

令人紧张的  (形势、时期等)；

(人) 紧张的；(肌肉) 紧绷的

You could feel the tension in the room as we waited for our exam results. 

你可以感受到每次公布考试成绩前，教室里的紧张感。

light   adj. 

free from worry; cheerful 快活的，无忧无虑的

Dinner should be a happy, light time with your family ... 

晚餐时间应该是你和家人之间快乐的温情时刻。

dedicated   adj. 

You use dedicated to describe something that is made, built, or designed for one particular purpose or thing. 
用法：dedicated作形容词还可以表示“投入的”
同根词：dedicate vt. 投身；献给；dedication n. 奉献
She is dedicated to her job. 

她为她的工作奉献了很多。

engage with sb/sth 

make an effort to understand and deal with sb or sth 与......建立密切关系；尽力理解

She has the ability to engage with young minds.  

她能够很好地理解年轻人的想法。

unwind    v. 

stop worrying or thinking about problems and start to relax放松

近义表达：relax，wind down，chill out
Music helps me unwind after a busy day.  

音乐让我在繁忙的一天充分放松。