The phenomena in which a consonant or vowel becomes nasalized- (a process where the velum is lowered so that air is forced through the nose instead of the mouth). In Gaelic this is sometimes an effect of assimilation, where vowels and other sounds become nasal because they are near other nasal sounds. More controversially, it is a marginal initial consonant mutation.
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- Ladefoged, D. (2010) A Course in Phonetics. 6th Edition. Wadsworth Publishing.
- Lamb, William (2003) Scottish Gaelic. 2nd edition. Munich: Lingcom Europa
- Ó Maolalaigh, Roibeard (1999) The Development of Eclipsis in Gaelic, Scottish Language 14–15 (1995–96), 158–73; cf. ‘The Development of Eclipsis and Common Gaelic’, in Celtic Connections: Proceedings of the 10th International Congress of Celtic Studies (East Linton: Tuckwell, 1999), p. 539