To speak further of derivation, in the matter of compounds and crystallized word groups there are usually differences between a spoken and written language. The written language is apt to establish certain canons which the people do not observe. For instance, we avoid hybrid compounds of Greek and Latin elements in the serious writing of English. In formal Latin we notice the same objection to Greco-Latin words, and yet in Plautus, and in other colloquial writers, such compounds are freely used for comic effect. In a somewhat similar category belong the combinations of two adverbs or prepositions, which one finds in the later popular Latin, some of which have survived in the Romance languages. A case in point is ab ante, which has come down to us in the Italian avanti and the French avant. Such word-groups are of course debarred from formal speech.
In examining the vocabulary of colloquial Latin, we have noticed its comparative poverty, its need of certain words which are not required in formal Latin, its preference for certain prefixes and suffixes, and its willingness to violate certain rules, in forming compounds and word-groups, which the written language scrupulously observes. It remains for us to consider a third, and perhaps the most important, element of difference between the vocabularies of the two forms of speech. I mean the use of a word in vulgar Latin with another meaning from that which it has in formal Latin. We are familiar enough with the different senses which a word often has in conversational and in literary English. “Funny,” for instance, means “amusing” in formal English, but it is often the synonym of “strange”