Slenderisation

We've seen that for most consonants, there's a broad and slender form, each one representing a separate sound in the language. For any consonant, broad or slender forms frequently alternate at the end of words e.g. cat a cat and cait cats. We say that t in cait is the slenderised form of t in cat. To put it another way, cait is the slenderised form of cat. In written Gaelic, a word is slenderised by inserting an i before the last consonant or group of consonants. The i before a final consonant tells us that the letter is to be pronounced differently i.e. as a slender consonant. The change of broad t to slender t is called slenderisation. It's important to note that the process of slenderisation only occurs at the end of words. Slenderisation is used to form the plural form of some nouns. Listen to the difference between:

Broad	Slender
[kahd]	cat	cat	[kahdʲ]	cait	cats
[duːn]	dùn	fortress	[duːNʲ]	dùin	fortresses
[baLəx]	balach	boy	[baLɪç]	balaich	boys
[bɔrʲəNəx]	boireannach	woman	[bɔrʲəNɪç]	boireannaich	women
[ɔːran]	òran	song	[ɔːraNʲ]	òrain	songs

Slenderisation of a final consonant can in some cases cause the preceding vowel to change form. Here are a few examples where the preceding vowel is affected by the process of slenderisation:

Broad	Slender
[maxg]	mac	son	[miçgʲ]	mic	sons
[fɛr]	fear	man	[firʲ]	fir	men
[krɔ͂xg]	cnoc	hill	[krũçgʲ]	cnuic	hill
[bɔːRʃd]	bòrd	table	[buːRʃdʲ]	bùird	tables
[fiəɣ]	fiadh	a deer	[feː]	féidh	more than one deer

Slenderisation is extremely important in Scottish Gaelic and you will meet many further instances of it as you progress.