ight不是词根是字母组合，如light，tight
例句
1、
There was a tight group of people around the speaker.
演讲人周围严严实实地挤了一群人。
2、
He was used to talking his way out of tight corners.
他惯于凭借口才摆脱困境。
3、
These shoes are a little on the tight side.
这双鞋略有点紧。
ight词根
通过词的本身的内部逻辑关系，词与词之间的外部逻辑关系记忆单词。背一个词根可以等于背了一系列近义词。词根如：“ight”，拓展为 light， right， fight， night， might， sight， tight.
