Single and double consonants

In the earlier lessons you might've encountered expressions such as single consonants and double consonants.
The functions of those are that they prolong the vowels so that you can distinguish between certain words.

I decided to count retroflex consonants as single consonants, despite being spelled with two consonants, because they're still counted as one single sound which makes vowels long.

This is a good example of how you can use single and double consonants to distinguish between two words:
Mål [moːl] goal and moll [mɔl] minor (music)

The combinations available are:
Bb, dd, ff, gg, ck, ll, mm, nn, pp, rr, ss and tt.
NOTE: Double K is always spelled ck, never kk.

In some words, single M may make vowels short, but we will talk more about that in the lessons about spelling.

There are also several spellings of the voiceless palatal-velar fricative [ɧ], but we'll discuss them in the lessons about the sje sound.