Yes, "un-" can be added as a prefix to "blind" to create "unblind," which means to restore sight or remove blindness. However, it is not commonly used and "blind" is generally used without a prefix.
"Cost" doesn't have a prefix. You could add the prefix ac- to it to make the word "accost."
Pre-The prefix for prefix is pre; because it's before the root word fix.
You could add the prefix af- to it to make the word affluent.
You could add the prefix non- to it to make the word nonstandard.
Pre- is a prefix that can be added to the word monition.
In the word "inform", in- is a prefix. You could add the prefix mis- to it to get misinform.
"Possibility" doesn't have a prefix. You could add the prefix im- to it to make the word impossibility.
If you were blind, you could hire a scribe to read and write for you.
Renumber is a prefix numbered is a suffix
"Social" doesn't have a prefix. You could add the prefix un- to it to make the word unsocial.
The current prefix is ex-. You could add the prefix in- to it to make the word inexcusable.
The current prefix is im-. You could add the prefix un- to it to make the word unimportant.
"Cost" doesn't have a prefix. You could add the prefix ac- to it to make the word "accost."
"Patients" doesn't have a prefix. You could add the prefix in- to it to get the word inpatients.
Pre-The prefix for prefix is pre; because it's before the root word fix.
If they were born blind u can't
You could add the prefix im- to it to make the word impossible.