Sentence:  Negative prefix in Russian is a distinctive feature of <WSD>nonverbal</WSD> parts of speech, namesly, nouns (even those that do not denote situations, e.g. 3a), adjectives (3b), and adverbs (3c): ... 
Meaning of the word marked with <WSD> tags:  of or relating to a word that belongs to any part of speech other than that of verbs