Prefixes and the Prefix “In”
Prefixes are key parts of English words. For instance, take the word pre fix itself. Pre , which means “before,” is
the prefix in the word pre fix. Fix, which means “fastened,” is the “stem,” or primary part of the word. Thus, a
prefix etymologically is that group of letters which is “fastened before” the stem of a word; that is, pre fixes begin
a word.
Today we will focus on the prefix in, which can mean “in, on, or not.”
Two highly used meanings of in are “in” or “on.” Let’s look at a few examples. In, for instance, can mean “in,”
such as in the words in ject, to throw “in,” and in flux, to flow “in.” In can also mean “on,” used in such words
as inscribe, to write “on,” and in voke, to call “on.” Hence, the first primary meanings of in are “in” or “on.”
The English prefix in can also, however, mean “not.” This is a trickier part of this prefix, but once you get the
hang of it, it’s highly valuable in decoding English vocabulary. Some examples of in meaning “not” include
insane, or “not” sane, in dependent, or “not” dependent, and in valid, or “not” valid.
By using common sense, context, or the process of elimination, you will find it easier to determine whether in
means “in, on” or “not.” For example, in ject, throw “in,” would make no sense as “not throw.” Conversely, the
word in sane makes little sense as “on” sane or sane “in;” rather “not” sane is the most obvious contextual
choice.
In our next rootcast we’ll discuss the prefix in again, paying attention to its spelling changes as it attaches to
various different stems. Just remember for now that in can mean “in, on, into or not,” and you’ll have this prefix
mastered “in” no time at all!
1. inject: throw ‘in’
2. influx: flow ‘in’
3. inscribe: write ‘on’
4. invoke: call ‘on’
5. insane: ‘not’ sane
6. independent: ‘not’ hanging from something
7. invalid: ‘not’ valid