Learn how to say Nasally correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word nasal:
1relating to the nose:
the nasal passages
a nasal spray
2 Phonetics (of a speech sound) pronounced by the breath resonating in the nose, e.g. m, n, ng, or French en, un. Compare with oral (sense 2 of the adjective).
(of the voice or speech) produced or characterized by resonation in the nose as well as the mouth:
a drawling nasal voice
1a nasal speech sound.
2 historical a nosepiece on a helmet.
Middle English (in nasal (sense 2 of the noun)): from medieval Latin nasalis, from Latin nasus ‘nose’