High Quality Content by WIKIPEDIA articles! Prenasalized consonants are phonetic sequences of a nasal and an obstruent (or a non-nasal sonorant) that behave phonologically like single consonants. The reasons for considering these sequences to be single consonants is in their behavior, not in their actual composition. However, there may also be phonetic correlates which distinguish prenasalized consonants from clusters involving nasal consonants. Because of the additional difficulty in both articulation and timing, prenasalized fricatives and sonorants are not as common as prenasalized plosives and the presence of the former implies the latter.