字
written character

To preserve written characters from deterioration transcribed them on bamboo bound into books.
中国的古代人为了保留汉字的书写,就把汉字刻在竹子上,后来人们才印成书。
Such precious written words came to be cherished as a child (子) is cherished under a roof ( 宝盖头 ) .
人们造字的时候非常喜欢这样的汉字,比如一个房子里有一个孩子,这个孩子可能在学习、写字。

Hence 字 : the written character.
从这以后,这幅图演变出的汉字就是“字”了。
Pictured here under the roof is a precious youthful character being preserved from deterioration.
在汉字演变的进程中,这幅图的意思演变的汉字是被保存得比较完整的。
The words below are all about 字:
字典 dictionary
写字 writing
汉字 Chinese character