Initial
consonant mutation is a phenomenon common to all Insular Celtic languages (there is no evidence of it in the ancient
Continental Celtic languages of the early first millennium). The first
consonant of a word in Welsh may change depending on grammatical context (such as when the grammatical
object directly follows the grammatical
subject), when preceded by certain words, e.g. , , and or when the normal word order of a sentence is changed, e.g. , "I have a house". Welsh has three mutations across four paradigms: the
soft mutation (), the
nasal mutation (), and the
aspirate (or
spirant)
mutation (); and the
mixed mutation () where the aspirate mutation is applied where possible, else the soft mutation is applied. These are represented in writing, as shown in the table below along with their corresponding
IPA symbols. : A blank cell indicates no change. For example, the word for "stone" is , but "the stone" is (soft mutation), "my stone" is (nasal mutation) and "her stone" is (aspirate mutation). • The soft mutation for
g is the simple deletion of the initial sound. For example, "garden" becomes "the garden". But this can behave as a consonant under certain circumstances, e.g. "gellir" (one can) becomes "ni ellir" (one cannot) not "*nid ellir". This however also stands alongside (), but () not *.
Soft mutation The
soft mutation (Welsh: ) is, by far, the most common mutation in Welsh. When words undergo soft mutation, the general pattern is that voiceless plosives become voiced plosives, voiced plosives become voiced fricatives, and voiceless
liquids becomes voiced. The full list is shown in the above table. Common situations where the
full soft mutation occurs are as follows – this list is by no means exhaustive: • adjectives (and nouns used adjectivally) qualifying feminine singular nouns • words immediately following the prepositions "for, about", "on", "to", / "under", / "over", / "through", "without", "until", "by", "at", "to, for", "of, from" • nouns used with the number two ( / ) • nouns following adjectives (N.B. most adjectives follow the noun) • nouns after the possessives , informal singular "your", and when it means "his" • an object of an inflected verb, except if it has the article • the second element in many compound words • the first letter of adverbs and adverbial phrases, especially of time (e.g. "every day" cf. "every"; N.B. itself does not cause mutation) • the second element in many adverbial phrases, e.g. "completely different" • when an adverbial phrase comes between two elements, the second element is mutated (e.g. "it is necessary to go" becomes "it is necessary to me to go") • verbs after the interrogative particle (e.g. "you walked", "did you walk?") In some cases a
limited soft mutation takes place. This differs from the full soft mutation in that words beginning with
rh and
ll do not mutate. Situations where the
limited soft mutation occurs are as follows: • feminine singular nouns with the definite article or the number one () • nouns or adjectives used predicatively or adverbially after (N.B. a verb-noun such as "going" does not change after ) • adjectives following or , both meaning "so" • sometimes after
prefixes ending in
-n or
-r such as
can- and
dar- The occurrence of the soft mutation often obscures the origin of placenames to non-Welsh-speaking visitors. For example, is the church of (
Mary, mother of Jesus), and is the bridge on the
Tawe.
Nasal mutation The
nasal mutation (Welsh: ) normally occurs: • after "my" e.g. "a bed", "my bed" • after the locative preposition "in" e.g. "Tywyn", "in Tywyn" • after the negating prefix , e.g. "fair", "unfair".
Notes • In
the spoken language the possessive adjective "my" is most often heard as if spelt (i.e. ) or, in the presence of the nasal mutation, omitted all together - e.g. "my father" ( omitted), "my apple", "my sister". In the literary language, however, it is always given as : . • The preposition becomes if the following noun (mutated or not) begins with
m, and if the following noun begins with
ng, e.g. "
Bangor", "in Bangor", "
Cardiff",
yng Nghaerdydd "in Cardiff". • In words beginning with
an-, the
n is dropped before the mutated consonant, e.g. + "personal" → "impersonal", although it is retained before a non-mutating letter, e.g. + "certain" → "uncertain", or if the resultant mutation allows for a double
n, e.g. + "undo" → "integral". (This final rule does not apply to words that would potentially produce a cluster of four consonants, e.g. + "order" → "disorder", not
*annhrefn.) Under nasal mutation,
voiced stop consonants become
voiced nasals, and plain stops become
voiceless nasals.
Grammatical considerations meaning "in" must be distinguished from other uses of which do not cause nasal mutation. For example: • "he's in Bangor": has undergone nasal mutation. • "he's ready": has undergone soft, not nasal, mutation. • "he's singing": a verb-noun such as is not mutated. In the second and third examples, is reduced to after a vowel. The form often used instead of after vowels does not cause nasal mutation. For example: • (not
*''i'm ngwlad'')
Aspirate mutation The aspirate mutation () turns the voiceless plosives into voiceless fricatives. In writing, the aspirate mutation is shown by an addition of an
h in the spelling (
c,
p,
t →
ch,
ph,
th), the resultant forms are single phonemes: ( → ). The aspirate mutation occurs: • after the possessive adjective when it means "her" • after "and" • after "with, by means of" • after the preposition "with" • for masculine nouns after the number three () • after the number six ()
Notes • The aspirate mutation resulting from "her" distinguishes it from "his" (which causes soft mutation) - e.g. "her father" (as opposed to "his father"). • "and" and "with, by means of" become and before vowels, respectively - e.g. "and an apple"; "don't wait". • "with" becomes before a vowel and is also seen shortened to . In
the spoken language, is restricted to Southern dialects (with the exception of a few set phrases) and is often replaced by or in the North depending on usage; the literary language, however, prefers the use of . • Feminine nouns are preceded by the numeral , not ; does not cause mutation - e.g. "three cats", but "three dogs". • The Welsh numeral becomes before a noun. This is similar to the numeral which is always before a noun - e.g. "six nations", "six mutations", "six children".
Mixed mutation A mixed mutation occurs after the particles (before a vowel ), (before a vowel ) and (before a vowel ) which negate verbs. Initial consonants which can take the
aspirate mutation do so; other consonants take the
soft mutation if possible - all other consonants do not mutate. For example, "I heard" is negated as "I did not hear", "that I did not hear" and "did I not hear?", whereas "I said" is negated as , and . In the
modern spoken language, the aspirate mutation is declining and is (outside of set phrases) often omitted or replaced by the soft mutation. However, in the formal literary language (here presented) all mutations are preserved and used as expected without regional or dialectal intrusion.
Phonetic values of mutated phonemes The true phonetic values of some of the Welsh phonemes, particularly are often debated in academia. It is often claimed that the voiceless nasals are actually aspirated . The value of Welsh is also often debated as to whether it has the underlying value or ; regardless of its underlying value, it is often heard as in the South and in the North. ==The article==