Word evolution game

[Travis B.]

[ʒ] > [r]

[gə'ryː.ʃi]
gëzhûshi
"tail, ribbon, streamer"

[Rounin Ryuuji]

Posttonic vowel reduction:

[gə'ryː.ʃə]
gerüsche
"tail, ribbon, streamer"

[Travis B.]

[yː] > [iu̯]

[gə'riu̯.ʃə]
gerüsche
"tail, ribbon, streamer"

[Rounin Ryuuji]

[r] > [ʁ]

[gə'ʁiu̯.ʃə]
gerüsche
"tail, ribbon, streamer"

[Man in Space]

Backing of front vowels around uvulars

[gə'ʁɯu̯.ʃə]
gerüsche
"tail, ribbon, streamer"

[Rounin Ryuuji]

Schwa loss, with compensatory lengthening accompanying syllable closure:

[gʁɯːu̯ʃ]
gerüsche
"tail, ribbon, streamer"

[Darren]

Assimilation

[ɢʁɯːu̯ʃ]
gerüsche
"ribbon, streamer"

[foxcatdog]

*ʃ > *s
[ɢʁɯːu̯s]
gerüsche
"jellyfish (literary) ribbon, streamer"

[Rounin Ryuuji]

Prerhotic stops lenite to fricatives:

[ɣʁɯːu̯s]
ghreous
"jellyfish; (literary) ribbon, streamer"

[Travis B.]

[ɣʁ] > [ʁː]

[ʁːɯːu̯s]
rreous
"jellyfish; (literary) ribbon, streamer"

[Rounin Ryuuji]

[ʁː] > [χː]

[xːɯːu̯s]
rreous

[Man in Space]

Initial fortis fricatives harden:

[qɯːu̯s]
qeous
"jellyfish; (literary) ribbon, streamer"

[foxcatdog]

Let's see what you can do with Yupirian numerals.
[‘jɛl:]
[‘mi:]
[‘pi.a:]
[‘e:t]
[‘pi.mi:]
['sim]
['tot]
[ki’pɔ]
[‘ka:.ja]
[‘tʲiː.si]

[Rounin Ryuuji]

Hawai'ian-style chain shift: [t] > [k] > [ʔ], but [tʲ] is unaffected

[‘jɛl:]
[‘mi:]
[‘pi.a:]
[‘e:k]
[‘pi.mi:]
['sim]
['kok]
[ʔi’pɔ]
[‘ʔa:.ja]
[‘tʲiː.si]

[foxcatdog]

I'm sorry i forgot the numeral for "nine" in my post.

[‘jɛl:]
[‘mi:]
[‘pi.a:]
[‘e:k]
[‘pi.mi:]
['sim]
['kok]
[ʔi’pɔ]
[‘ʔa:.ja]
[‘niz]
[‘tʲiː.si]

[Travis B.]

Quantity metathesis.

[‘jɛ:l]
[‘mi:]
[‘pi:.a]
[‘e:k]
[‘pi:.mi]
['sim]
['kok]
[ʔi’pɔ]
[‘ʔa:.ja]
[‘niz]
[‘tʲiː.si]

[Rounin Ryuuji]

Resonant chain shift, [j] > [l] > [r]:

[lɛ:r] lêr
[mi:] mî
[‘pi:.a] pîa
[‘e:k] êk
[‘pi:.mi] pîmi
[sim] sim
[kok] kok
[ʔi’pɔ] 'ipo
[‘ʔa:.la] 'âla
[niz] niz
['tʲiː.si] tîsi

[foxcatdog]

Coronal chain shift *tʲ > *s > *t

[lɛ:r] lêr
[mi:] mî
[‘pi:.a] pîa
[‘e:k] êk
[‘pi:.mi] pîmi
[tim] sim
[kok] kok
[ʔi’pɔ] 'ipo
[‘ʔa:.la] 'âla
[niz] niz
['siː.ti] tîsi

[Rounin Ryuuji]

Long vowels become closing diphthongs, with schwa insertion before coda resonants and semivowel gemination across syllable boundaries:

[lɛjər] leir
[mij] mii
[‘pij.ja] piyya
[‘ejk] éik
[‘pij.mi] piimi
[tim] tim
[kok] kok
[ʔi’pɔ] 'ipo
[‘ʔaj.la] 'aila
[niz] niz
['sij.ti] siiti

[Zju]

piimi is folk-etymologised as piyya + mii = piimii

[lɛjər] leir
[mij] mii
[‘pij.ja] piyya
[‘ejk] éik
[‘pij.mij] piimii
[tim] tim
[kok] kok
[ʔi’pɔ] 'ipo
[‘ʔaj.la] 'aila
[niz] niz
['sij.ti] siiti