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Related to lenition: Fortition
v. le·nit·ed, le·nit·ing, le·nites
To undergo an increase in sonority or become lenis. Said of consonant sounds, as when (p) changes to (b), (b) to (v), or (v) to (w).
To cause (a consonant sound) to lenite.
le·ni′tion (-nĭsh′ən) n.
(Phonetics & Phonology) the weakening of the articulation of a consonant sound, esp in a Celtic language
a phonological process that weakens consonant articulation at the ends of syllables or between vowels, causing the consonant to become voiced or pronounced as a fricative.