Zompist Bboard Again

[ɾ] > [ʁ]

[ˈmɛˑ.jʊ.ta.ʁəʊ]
meyutaró

"peace, tranqulity; (literary) order; (literary) orderliness, regularity; (of verbs) regular"

Loss of vowels in unstressed posttonic syllables:

[ˈmɛˑj.ta.ʁəʊ]
meitaró

"peace, tranqulity; (literary) order; (literary) orderliness, regularity; (of verbs) regular"

[jt] > [ɕt]

[ˈmɛˑɕ.ta.ʁəʊ]
meitaró

"peace, tranqulity; (literary) order; (literary) orderliness, regularity; (of verbs) regular"

Intertonic vowel reduction:

[ˈmɛˑɕ.tə.ʁəʊ]
meitaró

"peace, tranqulity; (literary) order; (literary) orderliness, regularity; (of verbs) regular"

*t-debuccalization

[ˈmɛˑɕ.hə.ʁəʊ]
meitaró

"peace, tranqulity; (literary) order; (literary) orderliness, regularity; (of verbs and bowels) regular"

*ɕ > *k > *t chainshift to fill the gaps
[ˈmɛˑk.hə.ʁəʊ]
mekharó

"peace, tranqulity; (literary) order; (literary) orderliness, regularity; (of verbs and bowels) regular"

Unstressed syllable loss.

Edit: Accidental two at once means a dialect split:

Dialect 1:

[ˈmɛˑɕ.ʁəʊ]
meitró
"peace, tranqulity; (literary) order; (literary) orderliness, regularity; (of verbs and bowels) regular"

Dialect 2:

[ˈmɛˑk.hə.ʁəʊ]
mekharó
"peace, tranqulity; (literary) order; (literary) orderliness, regularity; (of verbs and bowels) regular"

Unstressed syllable reduction gets applied to dialect 2
Dialect 1:

[ˈmɛˑɕ.ʁəʊ]
meitró
"peace, tranqulity; (literary) order; (literary) orderliness, regularity; (of verbs and bowels) regular"

Dialect 2:

[ˈmɛˑkh.ʁəʊ]
mekharó
"peace, tranqulity; (literary) order; (literary) orderliness, regularity; (of verbs and bowels) regular"

[kh] > [x]

Dialect 1:

[ˈmɛˑɕ.ʁəʊ]
meitró
"peace, tranqulity; (literary) order; (literary) orderliness, regularity; (of verbs and bowels) regular"

Dialect 2:

[ˈmɛˑ.xə.ʁəʊ]
mekharó
"peace, tranqulity; (literary) order; (literary) orderliness, regularity; (of verbs and bowels) regular"

Schwa loss begins in Dialect 1, but also ends up affecting Dialect 2

Dialect 1:

[ˈmɛˑɕ.ʁʊ]
meitru
"peace, tranqulity; (literary) order; (literary) orderliness, regularity; (of verbs and bowels) regular"

Dialect 2:

[ˈmɛˑx.ʁʊ]
mekhru
"peace, tranqulity; (literary) order; (literary) orderliness, regularity; (of verbs and bowels) regular"

Dialect 1 *m palatises before front vowels

[ˈnɛˑɕ.ʁʊ]
meitru
"peace, tranqulity; (literary) order; (literary) orderliness, regularity; (of verbs and bowels) regular"

Vowels raise

[ˈmɛˑx.ʁu]
mekhru
"peace, tranqulity; (literary) order; (literary) orderliness, regularity; (of verbs and bowels) regular"

Dialect 1: [ɛˑ] > [jæ] in closed syllables.

[ˈnjæɕ.ʁʊ]
meihru
"peace, tranqulity; (literary) order; (literary) orderliness, regularity; (of verbs and bowels) regular"

Dialect 2: [x] > [j] after front vowels.

[ˈmɛˑj.ʁu]
meihru
"peace, tranqulity; (literary) order; (literary) orderliness, regularity; (of verbs and bowels) regular"
[/quote]

A sense of national identity begins to develop, and the orthographies are harmonised.

[ˈu.β̃i.sam.na]
umisamna
"the great sea, west"

Coda nasals lost, leaving behind long nasal vowels:

[ˈu.β̃i.sãː.na]
umisamna
"the great sea, west"

(This word seems awfully familiar, but I wonder how it can have come to be...)

*u was orignally *o and the nasal was unlenited for the base word giving something like *oumi

Loss of nasal syllables following a nasal vowel

[ˈu.β̃i.sãː]
umisamna
"the great sea, west"

Breaking of nasal vowels.

[ˈu.β̃i.saw̃]
umisamna
"the great sea, west"

[β̃] > [w̃]

[ˈu.w̃i.saw̃]
umhisamh
"west"

*s > *ɬ

[ˈu.w̃i.ɬaw̃]
umhisamh
"west"

Schwa epenthesis after coda consonants.

[ˈu.w̃i.ɬa.w̃ə]
umhisamh
"west"