1. Begin with the word 'black'.
Move the vowel as far up and back as you can and tense it.
Apocope.
And you get:
2. Being with the word 'black'.
Metathesize the segments in the syllable onset.
Aphesis.
Swap the voicing for all stops: make anything that is voiced voiceless and anything that is voiceless voiced.
Change the place of all stops to alveolar.
Nasalize any voiced consonant.
And you get:
3. Begin with the word 'black'.
Apocope.
Make the second consonant in the onset of the syllable into a fricative. Do not change voicing or place of articulation.
Raise the vowel one position in the vowel trapazoid and tense it.
Move the fricative one place of articulation away from the place of articulation of the stop.
Metathesize the vowel and fricative.
And you get:
4. Begin with ... 'black'
Syncope on the vowel.
Metathesize the liquid and velar stop.
Syllabify the liquid.
The bilabial undergoes regressive voicing assimilation conditioned by the velar sound.
The velar sound undergoes progressive place of articulation assimilation conditioned by the word-initial sound.
Epenthesize a syllabic [r] between the bilabials.
And you get:
5. Begin with (you guessed it) 'black'.
Move the vowel as far up and forward as you can and tense it.
The first segment of the syllable onset undergoes regressive place of articulation assimilation conditioned by the stop in the coda.
The voiceless velar stop undergoes progressive place of articulation assimilation conditioned by the liquid in the syllable onset.
Voice all material in the syllable coda.
Replace the lateral liquid with the other english liquid.
Nasalize anything that is alveolar.
And you get:
6. Begin with 'pitch black'.
Reanalysis: erase the word boundary.
Metathesize the velar sound and the liquid.
Syncope on the lower of the two vowels.
Apocope.
Syncope on the africate.
Nasalize the voiced bilabial.
The bilabial undergoes regressive place of articuation assimilation conditioned by the last segment in the coda.
Make sure it's all backinto one syllable ...
And you get:
7. Begin with 'blackness'
Aphesis.
The consonant in the coda of the first syllable undergoes regressive place of articulation assimilation conditioned by the nasal.
Voice any fricatives.
Replace the lower of the vowels with a low back vowel.
Epenthesize a palatal glide before the
first syllable coda.
The coda of the second syllable undergoes assimilation of manner conditioned by the coda of the first syllable.
Reanalysis: place the word boundary between the adjacent alveolar sounds.
Replace the nasal with a nonlateral liquid.
And you get.