In the word "inform", in- is a prefix. You could add the prefix mis- to it to get misinform.
inaddable. The prefix in is used and also the suffix Able.
Add (something) at the beginning as a prefix or introduction.
"Im" is a common prefix in itself, you don't add a prefix to a prefix.
dinutrition
"Possibility" doesn't have a prefix. You could add the prefix im- to it to make the word impossibility.
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.
"Social" doesn't have a prefix. You could add the prefix un- to it to make the word unsocial.
"Cost" doesn't have a prefix. You could add the prefix ac- to it to make the word "accost."
no con is not a prefix because a prefix is something that you add to the root word at the front
"Patients" doesn't have a prefix. You could add the prefix in- to it to get the word inpatients.