etymology - Do "coterminous" and "conterminous" have exactly the same meaning?


I am under the impression that both coterminous and conterminous have exactly the same meaning. There was a remark that Latin purists prefer conterminous. Why?


Is there any significant difference between the two? Do co- and con- have same effect on words?


I am looking for any additional information about these two words which would help me understand them better.



Answer



Yes, conterminous and coterminous both mean "to share a boundary".


According to the entries for co- and con-, below, co- is an Anglicising of con-, which is possibly why Latin purists prefer con-


In this instance co- and con- both mean together or with.


Etymology of co-



in Latin, the form of com- in compounds with stems beginning in vowels and h- and gn- (see com-). Taken in English from 17c. as a living prefix meaning “together, mutually, in common,” and used promiscuously with native words and Latin-derived words not beginning with vowels, sometimes even with words already having it (e.g. co-conspiritor).



Etymology of con-



prefix meaning "together, with," sometimes merely intensive; the form of com- used in Latin before consonants except -b-, -p-, -l-, -m-, or -r-. In native English formations, co- tends to be used where Latin would use con- (e.g. costar).



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