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8
votes
4answers
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Origins of negative prefixes like in-, un-, il-, ir-, dis-, a-

I've read here about origins of in- and un- negative prefixes. Are there any known origins of other negative prefixes such as il-, ir-, dis-, a-?
9
votes
3answers
6k views

Are there any patterns to observe in choosing the correct negation prefix to use?

Are there any patterns to observe in choosing the correct prefix to use? There are other prefixes as well, but these are usually the ones I mix up. As in unbelievable, disproportionate, asymmetric, ...