This article or section is a stub. Please help Tolkien Gateway by expanding it.
Lenition refers to the mutation of medial consonants, occurring usually between two vowels (VCV). It affected the Old Sindarin sounds p, t, k, b, d, g, m and s.
The sounds w, kh were lenited only at the beginning of a word.
More specifically, the evolution of these sounds can be visualized in these examples:
- b > v
- OS *jabasse > S Iavas "autumn"[note 1]
- d > dh
- OS *badro > S badhor "brother"
- g > ∅
- OS *jaga > *jaȝa[note 2] > S iâ "abyss"[note 1]
As a consequence, this process took place also in Old Sindarin compounds, when the initial letter of a word was no longer initial in a compound. Even in later compounds that would be pure Sindarin, the lenition was solidified as a rule, envisioning retroactively the lenition process from a theoretical Old Sindarin compound.
For example the word athrabeth "debate, converse (lit. 'across-word')" can be analyzed both as a derivative of OS word *athrapettha but also as a compound of Sindarin words athra- "across" + peth "word".
The fact that the above sounds mutated when medially was solidified as a rule
- thind + coll > Thingol (< ?OS *Thindakollo)
- cair + tân > Cirdan (< ?OS *Kiriatâno)
- fanui + dol > Fanuidhol (< ?OS *Fanoidolo)
- Edhel + sarn > Edhelharn (< ?OS *Edelosarno)
- har- + Gondor > Harondor (< ?OS *Kharagonddor)
- ar- + gwend > Arwen (< ?OS *Arwende; no g- would evolve between ar- and wende)
- ↑ 1.0 1.1 Similar softening occurred in Quenya also.
- ↑ The intermediate stage of g to extinction was yogh