答：relax的名词形式是relaxation，它的复数是relaxations，翻译为休息、消遣。
1、relaxation的例句有：
Listening to a purring cat through a stethoscope is a great relaxation
technique. 用听诊器听猫发出的呼噜声是很好的放松技巧。
Crossing your arms may indicate relaxation, but it can also powerfully show
you are bored. 交叉双臂表示放松，但也能有力地表明你很无聊。
Imagine the feeling of relaxation rushing through your whole body.
想象一下全身都在放松的感觉。
短语有：stress relaxation 应力缓和 ; relaxation technique 松弛法；relaxation
method [数] [力] 松弛法 ; Relaxation therapy 放松疗法
2、relaxation的词根： relax v. 休息，（使）放松；放心，镇定
[ 第三人称单数 relaxes 现在分词 relaxing 过去式 relaxed 过去分词 relaxed ]
A bath can relax tense muscles. 泡个澡能放松紧绷的肌肉。
Let's just relax and enjoy ourselves. 咱们轻松一下，好好享受享受。
She just won't relax. 她就是不放松。
Allow your muscles to relax completely. 让你的肌肉完全放松。
短语有：Relax Yourself 关于放松自己 ;relax at home 在家放松
3、relaxation的同根词：relaxed、relaxant、relaxer
①relaxed 松懈的，放松的；
The alcohol warmed and relaxed him. 这酒使他浑身发暖轻松起来。
The atmosphere at lunch was relaxed. 午餐时的气氛是轻松的。
She looked relaxed as she plucked a chicken. 她拔鸡毛的时候看上去很轻松。
短语有：get relaxed and entertained 获得放松和文娱；relaxed alertness 放松性
②relaxant 放松的，[医] 弛缓的
Another experiment creates a muscle relaxant. 另一个实验是使得肌肉松弛。
③relaxer 松弛机；放松者
It is an instant relaxer. 这是一个立即放松的。
Did your last hairdresser use a relaxer? 你上一个理发师有使用过软发药水么？
I'm going to buy some relaxer for my hair. 我要买些顺发剂来弄我的头发。
短语有：Hair Relaxer 直发膏 ; wire relaxer 导线张弛调节器
标签：relax,名词,形式
