10 HISTORICAL ASPECTS
While Irish, due to secondary changes, has an unresolved ambiguity in the plural, the
homophonous third- person pronouns in both languages are successfully distinguished by
manipulation of the various mutation oppositions available in the languages. In Welsh,
the singular is distinguished from the plural by the latter being non- mutating; the sin-
gular genders are differentiated by employing separate mutations. Likewise in Irish, all
three mutational oppositions (lenition, eclipsis and non- mutation) are pressed into service
to distinguish the pronouns. What is noteworthy about this instance is that it shows that,
despite the differences in choice of available options, the two languages are identical in
their semiotic use of mutation to signal the three semantic oppositions in the third- person
pronoun. Thus the italicized entries in (4) exhibit the minimal opposition necessary to
convey the message of gender and number distinction. Examples like this suggest muta-
tions represent more than mere inherited phonological alternations; they show that both
languages also inherited the concept of functional exploitation of these markings for
making signifi cant grammatical distinctions.
Celtic languages also use mutations to mark objects of prepositions. At a minimum,
they distinguish a set of prepositions which mutate nominal objects from a set which does
not. For example, in Breton the prepositions da ‘to’ and war ‘on’ are associated with leni-
tion of their objects, but goude ‘after’ is not. More elaborately, Scots Gaelic and Welsh
make multiplex classifi cations of prepositions by mutation effects: the former dis-
tinguishes eclipsing, leniting and non- mutating prepositions and Welsh has leniting,
spirantizing, nasalizing and non- mutating groups.
Mutation of the preposition itself occurs at least colloquially in most Celtic languages.
Thus in Irish, the preposition dó ‘to’ is lenited in speech: dhom ‘to me’; in Welsh trwy
‘through’ occurs as drwy. This is related to the common tendency for adverbials to mutate
in all Celtic languages as part of the grammatical marking of the adverb category. Again
in Irish we have the inherently lenited adverbials thuas ‘above’, dháiríre ‘seriously’,
choíchin ‘never’, and in Welsh the permanently mutated weithiau ‘sometimes’, gartref
‘(at) home’, and lan ‘up’. In the Vannes dialect of Breton, the adjective mad ‘good’ is leni-
ted to mark its use as an adverbial.
As relates to the use of mutation with verbs, one usage which appears universal is the
association of mutations with different particles. As indicated below, Celtic makes use of
several particles in its syntax, pre- verbal particles for tense, interrogation and negation, as
well as at least two subordinating/relativizing particles. Invariably the negative particle
causes a mutation which distinguishes it from the positive form of the verb (which usu-
ally has the radical initial). Not all languages retain the use of interrogative particles, but
those that do, assign them a mutation effect, even when the overt particle is suppressed.
Combined negative- interrogative particles may have mutation effects of either (like an
interrogative in Irish, like a negative in Welsh).
All Celtic languages distinguish two subordinating particles by their mutation effects
(and sometimes by form as well). Very roughly, one particle is used for direct relatives
(subject or object targets in lower clause) and another for indirect or oblique relatives (rel-
ativization on some other case role constituent). For instance, in Irish the former particle
causes lenition on the verb and the latter causes eclipsis; in Breton, the former causes leni-
tion and the latter the so- called mixed mutation. In Welsh the choices are respectively
lenition and non- mutation.
Mutation plays a prominent role in derivational morphology. Generally, certain pre-
fi xes in all the Celtic languages trigger some sort of mutation. Prefi xes occasionally can
be distinguished by the (internal) mutation effects they cause on the stem. In Welsh, for
example, the prefi x am- means ‘around, about’ when it causes soft mutation on the stem,