ect
The prefix for "outer" is "out-".
it means out or outside of.
intra-
The prefix you would use with "cent" to mean center is "ec-" (as in eccentric).
A prefix goes at the beginning of a word. Hence the pre in prefix.
Add (something) at the beginning as a prefix or introduction.
A prefix is the word element at the beginning of a word.
Hyper is the prefix Prefix is the beginning word Hyper- Overactive
Mal- is the prefix of malfunction. It means bad, in this case a bad function.
ecarte
A prefix is added at the beginning of a word.
A prefix of "traditional" is "trad-" as it appears at the beginning of the word.