do show strong affinities with English, especially with its earlier stages. Denning, Keith; Kessler, Brett; Leben, William Ronald (17 February 2007). Formation of new words, called neologisms, based on Greek and/or Latin roots (for example television or optometry ) is a highly productive process in English and in most modern European languages, so much so that it is often difficult to determine in which language. International Phonetic Association (1999). The Handbook of English Linguistics. But some contemporary grammars such as that of Huddleston Pullum (2002 :598600) no longer consider government of case to be the defining feature of the class of prepositions, rather defining prepositions as words that can function as the heads of prepositional phrases.