In-.
Invincible.
The prefix "co-" could be used with the act.
The prefix "inter-" could be used with "cept" to form the word "intercept."
The prefix "re-" could be used with the word "active" to create the word "reactive."
Prefix could be:MetaAltiMegaNeo
The prefix "non-" could be used with the word "classic" to create "non-classic," describing something that is not classic or traditional.
Retro
counter-
inter-
semi-
The prefix "co-" could be used with the act.
The prefix "inter-" could be used with "cept" to form the word "intercept."
The prefix "re-" could be used with the word "active" to create the word "reactive."
Prefix could be:MetaAltiMegaNeo
In
The prefix "non-" could be used with the word "classic" to create "non-classic," describing something that is not classic or traditional.
The prefix "in-" could be used to form the word "unbroken," making it "incomplete."
Re-