A more thorough explanation:

ex visceribus verborum

From the mere words and nothing else; from the words themselves.

• When I read the email, I could tell from the ex visceribus verborum that my boss was angry.
• The lawyer argued that the contract was clear ex visceribus verborum and did not need any interpretation.

These examples show that ex visceribus verborum means that something is clear from the words themselves, without any additional context or interpretation needed. In the first example, the speaker could tell from the words in the email that their boss was angry, without needing any other information. In the second example, the lawyer argued that the contract was clear from the words alone, without needing any additional explanation or interpretation.