en_tn_condensed/heb/05/11.md

We have much to say

Even though the author uses the plural pronoun "we," he is most likely referring only to himself. Alternate translation: "I have much to say" (See: rc://en/ta/man/translate/figs-pronouns)

you have become dull in hearing

The ability to understand and obey is spoken of as if it were the ability to listen. And the ability to listen is spoken of as if it were a metal tool that becomes dull with use. Alternate translation: "you have trouble understanding it" (See: rc://en/ta/man/translate/figs-metaphor)