He's a real genius but he has difficulty verbalizing his ideas.
他確實是個天才，可是難以用語言表達他的思想。
牛津詞典
...his inability to verbalize his feelings.
他無法用言語表達自己的感情
I find it difficult to verbalize.
我感到很難用言語表達.
期刊摘選
I cannot verbalize it in a concrete way. I am sometimes quite confused.
就是很多事情我是說不出一個具體的東西,有時候也挺迷惑的.
期刊摘選
This depressed patient does not verbalize.
這位情緒低落的病人不愛說話.
期刊摘選
Watch out for how they verbalize with others.
2020年考研真題（英語二）閱讀理解 Section Ⅱ"This lawyer verbalizes and is rather tedious"
"She talks a lot of nonsense"
"This depressed patient does not verbalize"
"She expressed her anger"
"He uttered a curse"
"many English nouns have become verbalized"