From a typological perspective, the diachronic correspondence -n- ' -h- is perhaps the most marked development in the phonological history of the Basque language. The examples of such a process of sound change are extremely scarce around the world and have not been widely known until recent times. This is surely the reason why some scholars have tended to explain the historical replacement of -n- by -h- at the onset of the second syllable as a result of two different and completely unrelated processes of loss (of the nasal resonant) and insertion of an aspiration (with an allegedly antihiatic function).But since J. Matisoff's (1975) pioneering work on rhinoglottophilia, the mysterious connection between glotality and nasality, a new perspec...