「広がる広げる漢字の知識」ってどういう意味ですか


I believe that it must be some word play here, but what does it really mean?
What is 広がる広げる？

Edit: この文は漢字教材で出会いました。特別なコラムみたいなものです。普通の音読みと訓読みなどの学習ではなく、音の濁りや形声文字について紹介しています。




Is this the title of a book, article, lecture or such? This phrase is not
really a wordplay. It's just 広がる漢字の知識 ("expanding knowledge of kanji"; 広がる is
intransitive) and 広げる漢字の知識 ("knowledge of kanji _you_ expand"; 広げる is
transitive) said together. Technically, it's an example of [right-node
raising](https://japanese.stackexchange.com/a/17744/5010).




Is this the title of a book, article, lecture or such? This phrase is not
really a wordplay. It's just 広がる漢字の知識 ("expanding knowledge of kanji"; 広がる is
intransitive) and 広げる漢字の知識 ("knowledge of kanji _you_ expand"; 広げる is
transitive) said together. Technically, it's an example of [right-node
raising](https://japanese.stackexchange.com/a/17744/5010).

