disterrestrial
The prefix that can be added to the word "terrestrial" is "extra-" to form the word "extraterrestrial." This term refers to something that is outside or beyond Earth's atmosphere or of extraterrestrial origin.
The adding a prefix to the word "add" would result in the word "postadd".
To add a prefix to the word "definitely," you could use "in-" to form "indefinitely."
Pre-The prefix for prefix is pre; because it's before the root word fix.
Monthly doesn't have a prefix. You add the prefix bi- to it to make the word bi-monthly.
The prefix you can add to the word "social" to mean a lack of social interactions or relationships is "anti-".
subterrestrial
In the word "inform", in- is a prefix. You could add the prefix mis- to it to get misinform.
A prefix is a group of letters added at the beginning of a word to change its meaning, such as adding "un-" to "happy" to make "unhappy".
The adding a prefix to the word "add" would result in the word "postadd".
You could add the prefix mis- to it to make the word misfits.
The prefix 'im' can added to make the word impolite.
"Possibility" doesn't have a prefix. You could add the prefix im- to it to make the word impossibility.
Pre-The prefix for prefix is pre; because it's before the root word fix.
un-
Misspelled
mis
pre