Kernewek

Cornish Consonant Mutation Tables

Initial consonant mutation is a hallmark of Celtic linguistics. Words systematically alter their opening consonant based on what precedes them—whether possessive pronouns, prepositions, numbers, or grammatical gender.

Second state (soft mutation / lenition)(Treylyans medhel / nessa studh)

11 consonant transformations
Radical (Base)Mutated FormBlocked Exceptions
kgNone
pbNone
tdNone
chjNone
kwgwNone
qwgwNone
bvNone
ddhNone
gNone
gwwNone
mvNone

Third state (spirantization / aspirate mutation)(Treylyans hwythus / tressa studh)

3 consonant transformations
Radical (Base)Mutated FormBlocked Exceptions
khNone
pfNone
tthNone

Fourth state (hard / provection)(Treylyans kales / peswora studh)

4 consonant transformations
Radical (Base)Mutated FormBlocked Exceptions
bpNone
dtNone
gkNone
gwkwNone

Fifth state (mixed mutation)(Treylyans kemyskys / pympes studh)

10 consonant transformations
Radical (Base)Mutated FormBlocked Exceptions
kwwhNone
qwwhNone
gwhwNone
khNone
pfNone
tthNone
bfNone
dtNone
ghNone
mfNone

Common Mutation Triggers in Cornish

The following words and grammatical contexts trigger consonant mutations in Cornish:

owthird-state

my (1sg possessive, triggers 3rd state aspirate mutation on the following noun)

ki → ow hi (my dog)
dhasecond-state

your (sg, possessive)

ki → dha gi (your dog)
ysecond-state

his (3sg masculine possessive)

ki → y gi (his dog)
hythird-state

her (3sg feminine possessive, triggers 3rd state)

ki → hy hi (her dog)
agathird-state

their (3pl possessive, triggers 3rd state)

ki → aga hi (their dog)
ansecond-state

the (definite article, triggers 2nd state on a following feminine singular noun)

benyn → an venyn (the woman)
dewsecond-state

two (m, triggers 2nd state on a following noun)

ki → dew gi (two dogs)
diwsecond-state

two (f, triggers 2nd state on a following noun)

benyn → diw venyn (two women)
trithird-state

three (masculine form, triggers 3rd state on a following noun)

ki → tri hi (three dogs)
teyrthird-state

three (feminine form, triggers 3rd state on a following noun)

kath → teyr hath (three cats)
dhesecond-state

to (preposition, triggers 2nd state)

Kernow → dhe Gernow (to Cornwall)
warsecond-state

on (preposition, triggers 2nd state)

moes → war voes (on a table)

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